Perhaps you should try some spelling variations:
nhan thong » nhan trong, nha thong, nhan khong
chieu sang » chieu sach, chieu xanh, hieu lang
hieu manh » chieu xanh, hieu nganh, dieu hanh
quan dung » quang dung, quan duong, qua dung
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu manh) or (chieu sang)) - nhan thong quan dung cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu manh) OR (chieu sang)) - nhan thong quan dung cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) or (chieu sang)) - nhan thong quan dung cong dan toan cau*.