Perhaps you should try some spelling variations:
tranh luat » trinh luat, tranh luan, trinh luan
hieu manh » chieu xanh, hieu nganh, dieu hanh
tong cong » trong cong, cong cong, dung cong
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
hoc hieu » hoc thieu, hoc hien, doc hieu
tran cau » tran chau, toan cau, ran cau

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 luat ((tong cong) or (((hang cong) or (dang cong)))) tan tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - canh tranh luat ((tong cong) OR (((hang cong) OR (dang cong)))) tan tran cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - canh tranh luat ((tong cong) or (((hang cong) or (dang cong)))) tan tran cau*.