Perhaps you should try some spelling variations:
tran khanh » tran thanh, tran hanh, trung khanh
nhung cong » thong cong, hang cong, nhung don
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tran » hanh trang, thanh tran, hanh tram
dung cong » dung trong
hoc hieu » hoc thieu, hoc hien, doc hieu
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap

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 - hanh tran khanh ((nhung cong) OR (dung cong)) san toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - hanh tran khanh ((nhung cong) OR (dung cong)) san toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh tran khanh ((nhung cong) OR (dung cong)) san toan cao*.