- Exact phrase:
You are most probably to get better results when you put your search phrase in double quotes. Than Google will give you results with that exact phrase instead of synonyms. For an example if you type in: "marketing forum" Google will give you pages that contain those two words together.
- Exclude word
When you put minus (-) in front of some word Google will give you search result excluding that word. For instance: ebook -free will give you pages that contain word ebook excluding word free.
- Search for Keywords with Similar Meaning
Using sign ~ before some word will give you synonyms of that word. For instance if you type: shoes ~inexpensive Google will give you page results cheap shoes, affordable shoes...
- Any word in phrase
Operator * tells Google to give you any word on that place in phrase. For example: If you type: music * online Google will give you results like music education online, music radio online, music streaming online...
- File type search:
If you are using for specific file type like PDF just type filetype:pdf after your query. For instance: "how to paint" filetype:pdf will give you PDF documents with query how to paint
PS. Sorry about this smileys. There should be : p but when I put them together it shoes smiley