Perhaps you should try some spelling variations:
hien khanh » hien nhanh, dien khanh, thien thanh
hien hanh » dieu hanh
anh quang » anh xquang, anh quan, nhanh quang
duong van » duong va, luong va, dang van
quang va » quang van, quan va, quang ma
song van » hoang van, trong van, dang van
toan cao » toan ban, toan tap
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 khanh) or (hien hanh)) - anh quang va dung ((song van) or (duong van)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien khanh) OR (hien hanh)) - anh quang va dung ((song van) OR (duong van)) toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien khanh) or (hien hanh)) - anh quang va dung ((song van) or (duong van)) toan cao*.