Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trung » thanh trung, hanh trang, manh trung
hoc chieu » hoc thieu, ho chieu, hoc hien
phat dung » pham dung, phan dung, thuat dung
pham dang » phan dang, pham hang, pham quang
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sang - hanh trung ((phat dung) or (pham dang)) cong tan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - hanh trung ((phat dung) OR (pham dang)) cong tan phan cau.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - hanh trung ((phat dung) or (pham dang)) cong tan phan cau*.