Perhaps you should try some spelling variations:
banh trang » hanh trang, ban trang, banh rang
nhung cong » dung cong, thong cong, hang cong
hieu quan » hieu qua, lieu quan, thien quan
nhu hieu » nhu hien, nha hieu, nho hieu
trang va » tran van, hang va
cong dan » cong san, cong tan, huong dan
toan tai » toan tap, doanh tai, von tai
toan cao » toan tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: nhu hieu quan - banh trang va nhung cong dan ((((toan tai) or (toan cao))) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nhu hieu quan - banh trang va nhung cong dan ((((toan tai) OR (toan cao))) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: nhu hieu quan - banh trang va nhung cong dan ((((toan tai) or (toan cao))) or (toan ban))*.