Perhaps you should try some spelling variations:
khoan phai » khong phai, khoa phau, khoan hoi
bach khoan » bach khoa, cac khoan, bach hoa
phai thong » phap thong, phai tuong, phan thong
thuc cach » thuoc sach, truoc cach, thuc hanh
cach doan » cach hoan, hach toan, cac doanh
doan khau » doan khac, doanh chau, dao khau
khau cong » khu cong, khau tong, khach cong
thuc bach » truc bach, thuoc sach, thuc hanh
sach tri » sach tai, sach tren, sach truc
tri thuc » tri tue
sach dao » lanh dao
dao thuc » dan thuc, dao tuc, do thuc
te sach » toc sach
su sach » so sach, vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te sach tri thuc cach doan khau cong ) or ( su sach dao thuc bach khoan phai thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tri thuc cach doan khau cong ) OR ( su sach dao thuc bach khoan phai thong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach tri thuc cach doan khau cong ) or ( su sach dao thuc bach khoan phai thong ))*.