Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tang luan » dung luan
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
mang cua » manh cua, dung cua, ban cua
cong tan » cong tac, cong san, cong thanh
tran ban » tranh ban, toan ban, tran bai
tran van » luan van

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 sach - anh ((tang luan) or (mang cua)) nhung cong tan ((tran ban) OR (tran van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - anh ((tang luan) OR (mang cua)) nhung cong tan ((tran ban) OR (tran van)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu sach - anh ((tang luan) or (mang cua)) nhung cong tan ((tran ban) OR (tran van))".
• Adding a wildcard symbol may retrieve word variants: theo chu sach - anh ((tang luan) or (mang cua)) nhung cong tan ((tran ban) OR (tran van))*.