Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, truong thanh
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
tang cua » hang cua, tang luan, thong cua
mang cua » manh cua, dung cua, ban cua
cong tan » cong tac, cong san, cong ty
toan tap » toan ban

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