Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
cua thong » cua thuong, cua tong, suat thong
cua khong » hua khong, cua phuong, cua thuong
thong dan » thong van, tuong dan, thong den
hoc hieu » hoc thieu, hoc hien, doc hieu
dan chan » dan gian, dan ca, van chat
chan cac » phan cac, chon cac, nhan cach

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 manh - canh tranh ((cua thong) or (cua khong)) thong dan chan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - canh tranh ((cua thong) OR (cua khong)) thong dan chan cac.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - canh tranh ((cua thong) or (cua khong)) thong dan chan cac*.