Perhaps you should try some spelling variations:
thanh thanh » nhanh thanh, thanh toan, thanh phan
cong thanh » dong thanh, cong trinh, cong tan
dung cong » dung trong
thanh cap » thanh lap, hanh cap, than cap
ho chieu » theo chieu, hoc thieu, doi chieu
trang va » hang va
tran van » luan van

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 (theo tieu)) xanh - hanh ((trang va) OR (tran van)) dung cong thanh thanh cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo tieu)) xanh - hanh ((trang va) OR (tran van)) dung cong thanh thanh cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo tieu)) xanh - hanh ((trang va) OR (tran van)) dung cong thanh thanh cap".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo tieu)) xanh - hanh ((trang va) OR (tran van)) dung cong thanh thanh cap*.