Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
long range » longer range, long ran
thanh phan » thanh pho, thanh san, thanh toan
toc chieu » toc thieu, doc hieu, hoc thieu
cap thanh » cac thanh, lap thanh, tap thanh
long than » song than, luong thanh, dong thanh
tung cap » trung cap, cung cap, thong cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc chieu sach - thanh tung cap thanh ((long range) or (long than)) thanh phan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc chieu sach - thanh tung cap thanh ((long range) OR (long than)) thanh phan.
• Adding a wildcard symbol may retrieve word variants: toc chieu sach - thanh tung cap thanh ((long range) or (long than)) thanh phan*.