Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
luan hoan » luan van
hoan thon » hoa thon, hoang thoan, hoan thien
lang cong » dang cong, bang cong, hang cong
dung cong » dung trong
san khan » san khau, san khac, san phan
khan cap » khan ap, than cap, khoan cam

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 nhanh - luan hoan thon ((lang cong) or (dung cong)) san khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - luan hoan thon ((lang cong) OR (dung cong)) san khan cap*.