Perhaps you should try some spelling variations:
thuat nhung » thuat hung, thuat chung, thuat chuong
luat nhung » luat chung, luat thuong, cua nhung
doc hieu » toc thieu, hoc thieu, hoc hien
cong tac » cong ty
quan cau » quang cao, toan cau, quan ha
hieu ca » hieu cac, hieu cua, hieu va
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: doc hieu ca - canh tranh ((luat nhung) OR (thuat nhung)) cong tac ((quan cau) OR (tuan tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu ca - canh tranh ((luat nhung) OR (thuat nhung)) cong tac ((quan cau) or (tuan tu))~".
• Adding a wildcard symbol may retrieve word variants: doc hieu ca - canh tranh ((luat nhung) OR (thuat nhung)) cong tac ((quan cau) or (tuan tu))*.