Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
trinh van » trinh han, trinh quan, trinh toan
san thanh » ban thanh, van thanh, son thanh
thanh lap » thanh san, phan lap, thanh hai
ho chieu » theo chieu, doi chieu, mot chieu
trinh va » trinh vat, trinh ve, trinh vi
cong san » cong tac

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