Perhaps you should try some spelling variations:
cong ngang » cong nhan, cong quang, cong lang
ngang phan » nang phan, nang phat, nang phap
dung cong » dung trong
doc hieu » hoc thieu, hoc hien
cong van » cong vang, cong san, song van
van dung » van dong, xay dung, tin dung
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)) sach - thanh cong van dung cong ngang phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) sach - thanh cong van dung cong ngang phan lap.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) sach - thanh cong van dung cong ngang phan lap*.