Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
doc chieu » doc hieu, doi chieu, toc thieu
trung van » truong van, trong van, trung va
hoan cong » hoang cong, hoa cong, doan cuong
toan cong » tran cong, toan thong, doan cuong
than cau » toan cau, phan cau, than cap
khan ap » khan cap, han ap, khan dam

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc chieu sach - thanh trung van ((hoan cong) or (toan cong)) dan ((than cau) or (khan ap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc chieu sach - thanh trung van ((hoan cong) OR (toan cong)) dan ((than cau) OR (khan ap)).
• Adding a wildcard symbol may retrieve word variants: doc chieu sach - thanh trung van ((hoan cong) or (toan cong)) dan ((than cau) or (khan ap))*.