Perhaps you should try some spelling variations:
truong trung » tieng trung
hanh trinh » canh tranh, hanh chinh
tinh trang » minh trang, tinh quang, tinh toan
cua nhung » va nhung
chi sach » chinh sach, chieu sach, co sach
cong tan » cong tac, cong san, cong thanh
toan tap » toan ban
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi sach - ((tinh trang) or (hanh trinh)) cua nhung ((cong tan) or (truong trung)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sach - ((tinh trang) OR (hanh trinh)) cua nhung ((cong tan) OR (truong trung)) toan tap.
• Adding a wildcard symbol may retrieve word variants: doi chi sach - ((tinh trang) or (hanh trinh)) cua nhung ((cong tan) or (truong trung)) toan tap*.