Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
chieu sang » chieu sach, chieu xanh, hieu lang
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
trong dan » trong dang, trong san, trong tan
cua dung » cua dang, cua dong, qua dung
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu tinh) or (chieu sang)) - hanh tranh cua dung trong dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu tinh) OR (chieu sang)) - hanh tranh cua dung trong dan than tap.
• Adding a wildcard symbol may retrieve word variants: doc ((chieu tinh) or (chieu sang)) - hanh tranh cua dung trong dan than tap*.