Perhaps you should try some spelling variations:
toc chieu » doc hieu, hoc thieu, mot chieu
canh tran » canh tranh, hanh trang, banh trang
dong cong » duong cong, dung cong, dang cong
tran van » luan van
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc chieu) or (toc thieu)) xanh - canh tran van dong cong dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc chieu) OR (toc thieu)) xanh - canh tran van dong cong dan than ban*.