Perhaps you should try some spelling variations:
hien hanh » dieu hanh
anh quang » anh xquang, anh quan, nhanh quang
dung cong » dung trong
cong vang » cong lang, cong quang, cong ngang
vang tuan » van tuan, vong tuan, quang tuan
quang va » quang van, quan va, quang ma
tuan ban » tuan bang, toan ban, luan 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 hanh - anh quang va dung cong vang tuan ban~.
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - anh quang va dung cong vang tuan ban*.