Perhaps you should try some spelling variations:
chieu xanh » chieu sang, hieu manh
chieu tinh » trieu tinh, lieu tinh, chau tinh
chieu sach » chinh sach, chiet tach, chieu sang
hanh nang » anh nang, ganh nang, hanh mang
trong van » trong cac
van toan » van tuan, van tan, van thanh
toan cau » toan cao, toan ban, toan tap
nang su » dang su, nang du, nang tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((((chieu xanh) or (chieu tinh))) or (chieu sach)) - hanh nang su dung trong van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((((chieu xanh) OR (chieu tinh))) OR (chieu sach)) - hanh nang su dung trong van toan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((((chieu xanh) or (chieu tinh))) or (chieu sach)) - hanh nang su dung trong van toan cau*.