Perhaps you should try some spelling variations:
cach khuan » cac khoan, cach hoan
phau thong » phap thong, khau thong, phan thong
sach tham » sach nha
tham thuc » nham thuc, pham thuc, tam thuc
thuc cach » thuoc sach, truoc cach, thuc hanh
khuan dot » khuan doi, khuan noi, chuan do
dot trong » ro trong
thuc hang » thuc hanh, thu hang, phuc hang
hang khoa » dung khoa
khoa phau » hoa phan, khoa kham, khoa than
cach tri » cach thoi, cac tro, cach noi
tri thuc » tri tue
su sach » so sach, vu sach
tu cach » tu cac

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 tham thuc cach khuan dot trong ) or ( tu cach tri thuc hang khoa phau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach tham thuc cach khuan dot trong ) OR ( tu cach tri thuc hang khoa phau thong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach tham thuc cach khuan dot trong ) or ( tu cach tri thuc hang khoa phau thong ))*.