Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
nang sang » nang song, nong san
dung cong » dung trong
ho chieu » theo chieu, doi chieu, mot chieu
sang van » dang van, tang van, san van
van dung » van dong, xay dung, tin dung
cong tac » cong ty
tran cau » tran chau, ran cau, tra cau
toan cau » toan cao, toan ban, toan tap

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 - nang sang van dung cong tac ((tran cau) OR (toan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) xanh - nang sang van dung cong tac ((tran cau) OR (toan cau))".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) xanh - nang sang van dung cong tac ((tran cau) OR (toan cau))*.