Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
tong cong » trong cong, cong cong, dung cong
hoc hieu » hoc thieu, hoc hien, doc hieu
hieu luc » hieu luat, hieu qua
trong le » trong lam, trong ca, trong va
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than cau » toan cau, phan cau, than cap
le tong » le trong, le hong, le tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu luc - thanh trong le tong cong ban than cau~.
• Adding a wildcard symbol may retrieve word variants: hoc hieu luc - thanh trong le tong cong ban than cau*.