Perhaps you should try some spelling variations:
cong thanh » cong trinh, cong tan, truong thanh
dong thanh » truong thanh
hieu lang » chieu sang, hieu quang, nhieu tang
hop hieu » hop nhieu, hoi hieu, hoc thieu
hang cua » mang cua, hang ca, huong cua
toan ban » van ban
ban cua » ban quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hop hieu lang - hanh ((hang cua) or (ban cua)) nhung ((cong thanh) or (dong thanh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hop hieu lang - hanh ((hang cua) OR (ban cua)) nhung ((cong thanh) OR (dong thanh)) toan ban.
• Adding a wildcard symbol may retrieve word variants: hop hieu lang - hanh ((hang cua) or (ban cua)) nhung ((cong thanh) or (dong thanh)) toan ban*.