Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
phan xuong » phan cong
bach khong » bach khang, bach phuong, bach khoa
thuc hang » thuc hanh, thu hang, phuc hang
tham thuc » nham thuc, pham thuc, tam thuc
thuc bach » truc bach, thuc cach, thuoc sach
khong pho » khong kho, khong phai, khong khoa
pho thong » he thong
sach tai » sach bai, sach tham, sach dao
tai thuc » thai thuc, tri thuc, dai thuc
goc tham » goc kham, ngoc them, hoac tham
va phan » van phan, va phat, va phap
tu goc » tu hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thuat sach tai thuc hang va phan xuong ) or ( tu goc tham thuc bach khong pho thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thuat sach tai thuc hang va phan xuong ) OR ( tu goc tham thuc bach khong pho thong )).
• Adding a wildcard symbol may retrieve word variants: (( thuat sach tai thuc hang va phan xuong ) or ( tu goc tham thuc bach khong pho thong ))*.