Perhaps you should try some spelling variations:
hoc thieu » hoc hien
dung cong » dung trong
cong phan » cong nhan, cong khan, chong phap
phan dang » phan dau, phan cong, nhan dan
dang cham » nang cham, trang cham, duong cham
van hanh » van thanh, ban hanh, van anh
hanh va » hang va, hanh vi
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 thieu) or (toc thieu)) manh - van hanh va dung cong phan dang cham~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) manh - van hanh va dung cong phan dang cham.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (toc thieu)) manh - van hanh va dung cong phan dang cham*.