Perhaps you should try some spelling variations:
hanh dung » thanh dung, anh dung, hanh dong
nang cong » nang song, dang cong, bang cong
cong phan » cong nhan, cong khan, chong phap
phan phan » phap phan, phan phat, than phan
doc hieu » hoc thieu, hoc hien
dung van » duong van, dung va, dang van
van nang » van quang, van ban, van dong
phan lap » phan dau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) OR (toc thieu)) sang - hanh dung van nang cong phan phan lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) OR (toc thieu)) sang - hanh dung van nang cong phan phan lap".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) OR (toc thieu)) sang - hanh dung van nang cong phan phan lap*.