Perhaps you should try some spelling variations:
sang cong » dang cong, bang cong, hang cong
doc hieu » hoc thieu, hoc hien
chat lua » chat cua, chat va, chat huu
lua sang » luc sang, bua sang, cua sang
cong thi » cong thai, cong khi, dong thi
thi cong » tai cong, thien cong
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (toc thieu)) sang - tinh chat lua sang cong thi cong tan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) sang - tinh chat lua sang cong thi cong tan*.