Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, mot chieu
ho chieu » theo chieu, hoc thieu, mot chieu
trang va » hang va
tran van » luan van
cong san » cong tac
san chan » san chang, dan chan, san chay
chan cau » phan cau, can cau, chinh cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (ho chieu)) xanh - hanh ((trang va) OR (tran van)) nhung cong san chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (ho chieu)) xanh - hanh ((trang va) OR (tran van)) nhung cong san chan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (ho chieu)) xanh - hanh ((trang va) OR (tran van)) nhung cong san chan cau".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (ho chieu)) xanh - hanh ((trang va) OR (tran van)) nhung cong san chan cau*.