Perhaps you should try some spelling variations:
chiet tach » chieu sach
nhung cong » dung cong, thong cong, hang cong
hoc chiet » hoc thiet, hoc nhiet, hoc hien
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
cong van » cong vang, cong san, song van
van khan » van khanh, van khang, van phan
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: hoc chiet tach - thanh ((trung cua) or (trung cap)) nhung cong van khan ap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - thanh ((trung cua) OR (trung cap)) nhung cong van khan ap.
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - thanh ((trung cua) or (trung cap)) nhung cong van khan ap*.