Perhaps you should try some spelling variations:
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
cong dan » cong san, cong tan, huong dan
tung va » trung va, tuong va, dung va
tao cao » toan cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - thanh tung va nhung cong dan ((tao cao) or (bao cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - thanh tung va nhung cong dan ((tao cao) OR (bao cao)).
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - thanh tung va nhung cong dan ((tao cao) or (bao cao))*.