Perhaps you should try some spelling variations:
hoc thien » hoc hien, hoc thieu, hoc tien
hoc thiet » hoc thieu, hoc thuyet, hoc hien
hanh tran » hanh trang, thanh tran, hanh tram
van nhung » van nhuong, va nhung, van hung
tran van » luan van
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan tap » toan ban

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 thien) OR (hoc thiet)) nga - hanh tran van nhung ((cong dan) OR (cong tan)) toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thien) or (hoc thiet)) nga - hanh tran van nhung ((cong dan) OR (cong tan)) toan tap~".
• Adding a wildcard symbol may retrieve word variants: ((hoc thien) or (hoc thiet)) nga - hanh tran van nhung ((cong dan) OR (cong tan)) toan tap*.