Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
dang trong » dung trong, dong trong, lang trong
tranh cua » doanh cua, manh cua
trong dan » trong dang, trong san, trong tan
cua tinh » cua sinh, va tinh, ha tinh
cua dang » cua cong, cua ban
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 ((cua tinh) or (chieu xanh)) - hanh tranh cua dang trong dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((cua tinh) OR (chieu xanh)) - hanh tranh cua dang trong dan than tap.
• Adding a wildcard symbol may retrieve word variants: doc ((cua tinh) or (chieu xanh)) - hanh tranh cua dang trong dan than tap*.