Perhaps you should try some spelling variations:
ngang tuan » quang tuan, hoang tuan, nganh toan
cong ngang » cong nhan, cong quang, cong lang
hien hanh » dieu hanh
dung cong » dung trong
quang va » quang van, quan va, quang nam
quang ma » xquang ma, quang manh, quang nam
tuan ban » tuan bang, toan ban, luan 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 - anh ((quang va) or (quang ma)) dung cong ngang tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - anh ((quang va) OR (quang ma)) dung cong ngang tuan ban.
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - anh ((quang va) or (quang ma)) dung cong ngang tuan ban*.