Perhaps you should try some spelling variations:
thang hang » thanh hang, thanh hoang, thanh thang
hieu manh » chieu xanh, hieu nganh, dieu hanh
hang hang » nang hang, cang thang, hung thang
hang cong » dang cong, hang nong, bang cong
hoc hieu » hoc thieu, hoc hien, doc hieu
cau hang » cau hoang, cau thang, cuu khang
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, 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 - ((hang hang) or (thang hang)) cau hang cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - ((hang hang) OR (thang hang)) cau hang cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - ((hang hang) or (thang hang)) cau hang cong dan toan cao*.