Perhaps you should try some spelling variations:
thanh trung » thanh tung
chiet tach » chieu sach
hanh trang » canh tranh, hanh trinh, minh trang
ho chiet » ho chieu, ho thiet, hoc thiet
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan cao » toan ban, toan tap

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 trang) OR (thanh trung)) va nhung ((cong tan) or (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - ((hanh trang) OR (thanh trung)) va nhung ((cong tan) OR (cong san)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - ((hanh trang) OR (thanh trung)) va nhung ((cong tan) or (cong san)) toan cao".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - ((hanh trang) OR (thanh trung)) va nhung ((cong tan) or (cong san)) toan cao*.