Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
doi chieu » doc hieu, doi chi, ho chieu
hanh dong » anh dong
dan phan » doan phan, dan chan, van phan
phan cau » phan dau, phan cac, phan tu
ha dong » hoat dong, van dong

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu tinh - hanh trinh quan ((thanh cong) or (((hanh dong) OR (ha dong)))) dan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu tinh - hanh trinh quan ((thanh cong) OR (((hanh dong) OR (ha dong)))) dan phan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu tinh - hanh trinh quan ((thanh cong) or (((hanh dong) OR (ha dong)))) dan phan cau*".