Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hanh trung » thanh trung, manh trung, danh trung
tuan nhung » quan nhung, tuan hung, thuat nhung
nhung cong » dung cong, thong cong, hang cong
hieu cach » hieu cac, chieu sach, hieu ca
doc hieu » toc thieu, hoc thieu, hoc hien
tan van » tran van, tang van, dang van
luan » quan, lan

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