Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
anh quang » anh xquang, anh quan, nhanh quang
quang vat » quang va, quang van, quang phat
dung cong » dung trong
van thanh » ban thanh, van tuan
vat dung » van dung, va dung, viet dung
van toan » van tuan, van tan, manh toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((dieu hanh) or (hien nhanh)) - anh quang vat dung cong ((van toan) OR (van thanh)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dieu hanh) OR (hien nhanh)) - anh quang vat dung cong ((van toan) OR (van thanh)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((dieu hanh) or (hien nhanh)) - anh quang vat dung cong ((van toan) OR (van thanh)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((dieu hanh) or (hien nhanh)) - anh quang vat dung cong ((van toan) OR (van thanh)) ban*.