Perhaps you should try some spelling variations:
luat nhung » luat thuong, thuat nhung, cua nhung
luat chung » luan chung, luat thuong, cua chung
hieu cach » hieu cac, chieu sach, hieu ca
hoc hieu » hoc thieu, hoc hien, doc hieu
cong tac » cong ty
quan cau » quang cao, toan cau, quan ha
tuan tu » tuan thu, tran tu, toan tu

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 cach - canh tranh ((luat nhung) OR (luat chung)) cong tac ((quan cau) OR (tuan tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu cach - canh tranh ((luat nhung) OR (luat chung)) cong tac ((quan cau) or (tuan tu))~".
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - canh tranh ((luat nhung) OR (luat chung)) cong tac ((quan cau) or (tuan tu))*.