Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
trinh tuan » trinh quan, trinh toan, trinh luan
tuan nhung » quan nhung, tuan hung, thuat nhung
nhung cong » dung cong, thong cong, hang cong
hoc chiet » hoc thiet, hoc nhiet, hoc hien
hach toan » thanh toan
manh toan » thanh toan, anh tuan, tinh toan
tac toan » tap toan, tam toan, tich toan

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 - hanh trinh tuan nhung cong ((tac toan) or (((hach toan) or (manh toan)))) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - hanh trinh tuan nhung cong ((tac toan) OR (((hach toan) OR (manh toan)))) cao.
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh trinh tuan nhung cong ((tac toan) or (((hach toan) or (manh toan)))) cao*.