Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
thanh tap » thanh tai, thanh tay, thanh tam
thanh lap » thanh san, phan lap, thanh hai
doc hieu » toc thieu, hoc thieu, hoc hien
cong van » cong vang, cong san, song van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu manh - canh tranh cua nhung cong van ((thanh tap) or (thanh lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - canh tranh cua nhung cong van ((thanh tap) OR (thanh lap)).
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - canh tranh cua nhung cong van ((thanh tap) or (thanh lap))*.