Perhaps you should try some spelling variations:
thanh chung » thanh chuong, thanh hung, thanh phuong
khoan hang » khoan thanh, khoa dang, hoan hoang
cong ngang » cong nhan, cong quang, cong lang
ngang phan » nang phan, nang phat, nang phap
doi chieu » doc hieu, doi chi, mot chieu
hang cong » dang cong, hang nong, bang cong
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (toc thieu)) sach - thanh chung khoan hang cong ngang phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) sach - thanh chung khoan hang cong ngang phan dau.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (toc thieu)) sach - thanh chung khoan hang cong ngang phan dau*.