Perhaps you should try some spelling variations:
khoan kham » khoa kham, khoanh khac, khoan cam
kham thong » khap thong, khau thong, pham thuong
sach tren » sach tien, sach tranh
phu thong » pho thong, phap thong, khau thong
tren thuc » trien thuc, tron thuc, trinh thuc
sach tri » sach tai, sach truc, sach bai
tri thuc » tri tue
thuc cac » thuc cach, tuc cac, phuc cac
cac khoa » cac khoi, dac khoa, cao khoa
khoa phu » khoa phau, khoa thu, hoa phu
su sach » so sach, vu sach
tu sach » thu sach, te sach, tu cach

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 thuc cac khoa phu thong ) or ( tu sach tren thuc cac khoan kham thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach tri thuc cac khoa phu thong ) OR ( tu sach tren thuc cac khoan kham thong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach tri thuc cac khoa phu thong ) or ( tu sach tren thuc cac khoan kham thong ))*.