Perhaps you should try some spelling variations:
chiet tach » chieu sach
thong cong » trong cong, tong cong, thong thong
thanh toan » thanh hoa, thanh san, tinh toan
hoc chiet » hoc thiet, hoc nhiet, hoc hien
manh toan » anh tuan, tinh toan
tung cua » trung cua, tuong cua, tang cua
dung cua » dung luan, dung cho

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 ((tung cua) OR (dung cua)) thong cong ((manh toan) or (thanh toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - thanh ((tung cua) OR (dung cua)) thong cong ((manh toan) OR (thanh toan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chiet tach - thanh ((tung cua) OR (dung cua)) thong cong ((manh toan) or (thanh toan)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - thanh ((tung cua) OR (dung cua)) thong cong ((manh toan) or (thanh toan)) ban*.