Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
chieu tinh » trieu tinh, lieu tinh, chau tinh
hien xanh » hien hanh, chieu xanh, hien khanh
anh quang » anh xquang, anh quan, nhanh quang
dung cong » dung trong
quang va » quang van, quan va, quang ma
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((((hien xanh) or (hien nhanh))) or (chieu tinh)) - anh quang va dung cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((hien xanh) OR (hien nhanh))) OR (chieu tinh)) - anh quang va dung cong san toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((((hien xanh) or (hien nhanh))) or (chieu tinh)) - anh quang va dung cong san toan ban*.