Perhaps you should try some spelling variations:
hien nhanh » thien thanh, tien thanh, dien thanh
hien hanh » dieu hanh
anh quang » anh xquang, anh quan, nhanh quang
quang vat » quang va, quang van, quang phat
vat dung » van dung, va dung, viet dung
cong van » cong vang, song van, cong tan
cong san » cong tac
tan ban » toan ban, tang ban, van ban

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