Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
luan han » luan hoan, luan phan, luan van
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo tieu) or (hoc thieu)) tinh - hanh tang luan han ((cong dan) or (cong tan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo tieu) OR (hoc thieu)) tinh - hanh tang luan han ((cong dan) OR (cong tan)) toan cau.
• Adding a wildcard symbol may retrieve word variants: ((theo tieu) or (hoc thieu)) tinh - hanh tang luan han ((cong dan) or (cong tan)) toan cau*.