Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh trinh » canh tranh
dung cong » dung trong
chinh cau » chinh chau, chinh ca, chinh tai
chinh can » chinh ca, chinh ban, chinh ngan
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong san, cong tan, huong dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu tinh - ((hanh trinh) or (hanh chinh)) su dung cong dan ((chinh cau) OR (chinh can))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu tinh - ((hanh trinh) OR (hanh chinh)) su dung cong dan ((chinh cau) OR (chinh can)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu tinh - ((hanh trinh) or (hanh chinh)) su dung cong dan ((chinh cau) OR (chinh can))".
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - ((hanh trinh) or (hanh chinh)) su dung cong dan ((chinh cau) OR (chinh can))*.