Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
cong tan » cong tac, cong san, cong thanh
tan cong » tan cuong, tran cong, toan cong
dong van » duong van, dang van, dong von
toan tap » toan ban
toan cao » toan ban
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 - thanh cong tan cong dong van ((toan tap) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh cong tan cong dong van ((toan tap) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh cong tan cong dong van ((toan tap) or (toan cao))*.