Perhaps you should try some spelling variations:
khoan phau » khoa phau, khoan phai, khoa chau
phau thong » phap thong, khau thong, phan thong
sach dao » lanh dao
so sach » bo sach, co sach, hoc sach
so sanh » do sanh
tue cac » tu cac, tuc cac, te cac
tu sach » thu sach, su sach, te sach
dac hoa » dac khoa, duc hoa, dai hoa
dao le » do le, dao ve, hao le
le dac » le dan, le duc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((so sach) or (so sanh)) tri tue cac khoan phau thong ) or ( tu sach dao le dac hoa he thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((so sach) OR (so sanh)) tri tue cac khoan phau thong ) OR ( tu sach dao le dac hoa he thong )).
• Adding a wildcard symbol may retrieve word variants: (( ((so sach) or (so sanh)) tri tue cac khoan phau thong ) or ( tu sach dao le dac hoa he thong ))*.