Perhaps you should try some spelling variations:
trinh xuat » trinh luat, trinh xuan, trich xuat
trinh quan » tinh quang, trinh luat, trinh han
hieu manh » chieu xanh, hieu nganh, dieu hanh
hoc hieu » hoc thieu, hoc hien, doc hieu
dung ung » dung cong
van than » van thanh, van thang, van tuan
than cau » toan cau, phan cau, than cap
ung van » dung van, vung van, cung van

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 ((trinh xuat) or (trinh quan)) dung ung van than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh ((trinh xuat) OR (trinh quan)) dung ung van than cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh ((trinh xuat) or (trinh quan)) dung ung van than cau*.