Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
han nhung » hanh nhung, hon nhung, hay nhung
ban nhung » san nhung, ban phuong, gian nhung
cong tanh » cong thanh, cong tinh, cong danh
ho chiet » ho chieu, ho thiet, hoc thiet
cong tan » cong tac, cong san, cong thanh
tuan tu » tuan thu, tran tu, toan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chiet tach - hanh trinh ((han nhung) OR (ban nhung)) ((cong tanh) or (cong tan)) tuan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh trinh ((han nhung) OR (ban nhung)) ((cong tanh) OR (cong tan)) tuan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - hanh trinh ((han nhung) OR (ban nhung)) ((cong tanh) or (cong tan)) tuan tu".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh trinh ((han nhung) OR (ban nhung)) ((cong tanh) or (cong tan)) tuan tu*.