Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
anh quang » anh xquang, anh quan, tinh quang
dung cong » dung trong
vat dung » van dung, va dung, viet dung
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
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: hoc hien xanh - ((anh quang) or (nhanh quang)) vat dung cong van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((anh quang) OR (nhanh quang)) vat dung cong van toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((anh quang) or (nhanh quang)) vat dung cong van toan cau*.