Perhaps you should try some spelling variations:
khoan phau » khoa phau, khoan phai, khoa chau
phau thong » phap thong, khau thong, phan thong
khoan khac » khoanh khac, khoa khac, khoa kham
khac cong » khach cong, khau cong, khac xuong
sach tri » sach tai, sach tren, sach truc
sach bai » sach dao, cac bai, sach xa
su sach » so sach, vu sach
tue cac » tu cac, tuc cac, te cac
tu sach » thu sach, te sach, tu cach
bai hoc » dai hoc
hoc cac » hoc cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach tri tue cac khoan phau thong ) or ( tu sach bai hoc cac khoan khac cong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach tri tue cac khoan phau thong ) OR ( tu sach bai hoc cac khoan khac cong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach tri tue cac khoan phau thong ) or ( tu sach bai hoc cac khoan khac cong ))*.