Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hien xanh » hien hanh, hien nhanh, chieu xanh
anh quang » anh xquang, anh quan, tinh quang
dung cong » dung trong
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
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 (chieu tinh)) - ((anh quang) OR (nhanh quang)) va dung cong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (chieu tinh)) - ((anh quang) OR (nhanh quang)) va dung cong van toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (chieu tinh)) - ((anh quang) OR (nhanh quang)) va dung cong van toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (chieu tinh)) - ((anh quang) OR (nhanh quang)) va dung cong van toan ban*.