Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc chiet » hoc thiet, hoc nhiet, hoc hien
tranh cua » doanh cua, manh cua
cua tong » cua cong, cua dong, cua nong
cong tan » cong tac, cong san, cong thanh
song van » hoang van, trong van, duong van
tan tap » toan tap, han tap, tan tat

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 tranh cua tong ((cong tan) or (song van)) tan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - hanh tranh cua tong ((cong tan) OR (song van)) tan tap.
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh tranh cua tong ((cong tan) or (song van)) tan tap*.