Perhaps you should try some spelling variations:
thuat nhung » thuat hung, thuat chung, thuat chuong
hanh trung » thanh trung, hanh trang, manh trung
tuan nhung » quan nhung, tuan hung, tranh nhung
hieu cach » hieu cac, chieu sach, biet cach
cong luan » tong luan, cong tuan, dong luan
hieu ca » hieu cac, hieu cua, hieu va

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) OR (hieu ca)) - hanh trung ((tuan nhung) OR (thuat nhung)) cong luan van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu cach) OR (hieu ca)) - hanh trung ((tuan nhung) or (thuat nhung)) cong luan van ban~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu cach) OR (hieu ca)) - hanh trung ((tuan nhung) or (thuat nhung)) cong luan van ban*.