Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
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
van nang » van quang, van ban, van dong
phan lap » phan dau
dat van » dao van, dat va, dam van

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 - thanh dat van nang cong phan phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) sang - thanh dat van nang cong phan phan lap.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) sang - thanh dat van nang cong phan phan lap*.