Perhaps you should try some spelling variations:
thieu manh » hieu manh, tien manh, trieu minh
tien thanh » tien thinh, tran thanh, den thanh
nhung cong » dung cong, thong cong, hang cong
tranh va » tranh van, trang va, trinh va
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu manh) or (tien thanh)) - canh tranh va nhung cong dan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu manh) OR (tien thanh)) - canh tranh va nhung cong dan phan dau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu manh) or (tien thanh)) - canh tranh va nhung cong dan phan dau*.