Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
hang cong » dang cong, hang nong, bang cong
trang va » hang va
tran van » luan van
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu nganh) or (chieu sach)) - hanh ((trang va) or (tran van)) hang cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu nganh) OR (chieu sach)) - hanh ((trang va) OR (tran van)) hang cong dan than cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) or (chieu sach)) - hanh ((trang va) or (tran van)) hang cong dan than cau*.