Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
nang cong » nang song, dang cong, bang cong
san thanh » ban thanh, van thanh, son thanh
ho chieu » theo chieu, doi chieu, mot chieu
trang va » hang va
tran van » luan van
cong san » cong tac
thanh ca » thanh cha, thanh cac, thanh ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (hoc thieu)) xanh - thanh ((trang va) OR (tran van)) nang cong san thanh ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - thanh ((trang va) OR (tran van)) nang cong san thanh ca*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc thieu)) xanh - thanh ((trang va) OR (tran van)) nang cong san thanh ca*".