Perhaps you should try some spelling variations:
trinh nhung » trinh phuong, trinh dung
tranh nhung » tranh hang, tran hung, thanh hung
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tran » hanh trang, thanh tran, hanh tram
hoc hieu » hoc thieu, hoc hien, doc hieu
cong san » cong tac
tuan cao » juan cao, quang cao, thuan cam
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh tran ((tranh nhung) OR (trinh nhung)) cong san ((tuan cao) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - hanh tran ((tranh nhung) OR (trinh nhung)) cong san ((tuan cao) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh tran ((tranh nhung) OR (trinh nhung)) cong san ((tuan cao) or (toan cao))*.