Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh dan » trinh dan, tranh ban, thanh dan
tdung dat » trung dai, vung dat, dong dat
toc hieu » toc thieu, doc hieu, hoc thieu
dan dung » van dung, tin dung, ap dung
dung dat » dung va, dung tai
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: toc hieu manh - canh tranh dan dung ((tdung dat) or (dung dat)) phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu manh - canh tranh dan dung ((tdung dat) OR (dung dat)) phan dau.
• Adding a wildcard symbol may retrieve word variants: toc hieu manh - canh tranh dan dung ((tdung dat) or (dung dat)) phan dau*.