Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
cap thong » cap tong, chap thuong, phap thong
thanh bac » nhanh bac, thanh bai, thanh san
cong san » cong tac
than cap » khan cap, thanh lap, thanh cac
ho hieu » ho chieu, hoi hieu, nho hieu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - ((thanh tung) OR (thanh cong)) cap thong cong san ((than cap) OR (thanh bac))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - ((thanh tung) OR (thanh cong)) cap thong cong san ((than cap) or (thanh bac))~".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((thanh tung) OR (thanh cong)) cap thong cong san ((than cap) or (thanh bac))*.