Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, chau tinh, kieu tinh
hanh trinh » canh tranh, hanh chinh
lieu tinh » trieu tinh, diep tinh, bien tinh
trinh cua » tinh cua, trinh luat, trinh quan
cua dung » cua dang, cua dong, qua dung
cong dan » cong tan, huong dan, cong dong
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: hoc ((chieu tinh) or (lieu tinh)) - hanh trinh cua dung ((cong dan) OR (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (lieu tinh)) - hanh trinh cua dung ((cong dan) OR (cong san)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu tinh) or (lieu tinh)) - hanh trinh cua dung ((cong dan) OR (cong san)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) or (lieu tinh)) - hanh trinh cua dung ((cong dan) OR (cong san)) toan cao*.