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
tranh vat » trinh vat, tranh va, tran van
tranh van » tran van, trinh van, thanh van
doi hieu » doi chieu, doc hieu, doi hien
san tap » han tap, man tap, san tay

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

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