Perhaps you should try some spelling variations:
chiet tach » chieu sach
manh trung » manh tung, thanh trung, manh hung
hoc chiet » hoc thiet, hoc nhiet, hoc hien
trung cua » truong cua, trung tuan, trung cap
cua trong » cua truong, cua trung, qua trong
cong tac » cong ty
toan ban » van ban

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 - manh trung cua trong cong tac ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - manh trung cua trong cong tac ((toan tap) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - manh trung cua trong cong tac ((toan tap) or (toan ban))*.