Perhaps you should try some spelling variations:
khoan phai » khong phai, khoa phau, khoan hoi
kham thong » khap thong, khau thong, pham thuong
phai thong » phap thong, phai tuong, phan thong
hanh khoa » hang khoa, anh khoa, hanh hoa
khoa kham » kho khan, khoa than
hoach tri » hoach toi, hoach hoi, hoach thu
sach tri » sach tai, sach tren, sach truc
tu sach » thu sach, su sach, te sach
tue cac » tu cac, tuc cac, te cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach tri thuc hanh khoa kham thong ) or ( thu hoach tri tue cac khoan phai thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tri thuc hanh khoa kham thong ) OR ( thu hoach tri tue cac khoan phai thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tri thuc hanh khoa kham thong ) or ( thu hoach tri tue cac khoan phai thong ))*.