Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh dung » thanh duong, thanh tung, thanh hung
thong cong » trong cong, tong cong, thong thong
hoc chieu » hoc thieu, ho chieu, hoc hien
cua thong » cua thuong, cua khong, cua tong
tac chuan » tac quan, tac cua, tac can
dung cua » dung luan, dung cho
tac nhan » tao nhan, cac nhan, dac nhan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - thanh dung cua thong cong ((tac nhan) or (tac chuan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - thanh dung cua thong cong ((tac nhan) OR (tac chuan)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - thanh dung cua thong cong ((tac nhan) or (tac chuan)) ban*.