Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sach » chinh sach, chiet tach, chieu sang
hanh hang » thanh hang, hang hang, hanh han
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
chu van » cuu van, chu han

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu van) or (chieu sach)) - hanh hang va nhung cong dan ((toan cau) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu van) OR (chieu sach)) - hanh hang va nhung cong dan ((toan cau) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu van) or (chieu sach)) - hanh hang va nhung cong dan ((toan cau) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: theo ((chu van) or (chieu sach)) - hanh hang va nhung cong dan ((toan cau) OR (toan tap))*.