Perhaps you should try some spelling variations:
cang thang » cong thanh, dang thanh
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
ho chieu » theo chieu, doi chieu, mot chieu
thang va » hang va, trang va, thong va
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 - cang thang va nhung cong tac ((tran cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - cang thang va nhung 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 - cang thang va nhung cong tac ((tran cau) or (toan cau))".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) xanh - cang thang va nhung cong tac ((tran cau) or (toan cau))*.