Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
hoc chiet » hoc thiet, hoc nhiet, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
manh toan » thanh toan, anh tuan, tinh toan
dan than » dan chan, ban than, van than

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