Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
tranh va » tranh van, trang va, thanh va
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
phan cau » phan dau, phan cac, phan tu
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - canh ((tranh va) OR (trinh va)) thong ((cong dan) or (cong san)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - canh ((tranh va) OR (trinh va)) thong ((cong dan) OR (cong san)) phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - canh ((tranh va) OR (trinh va)) thong ((cong dan) or (cong san)) phan cau".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - canh ((tranh va) OR (trinh va)) thong ((cong dan) or (cong san)) phan cau*.