Perhaps you should try some spelling variations:
khau thong » khau thuong, khap thong, khau tong
sach nham » sach nha, sach tham, sach han
nham thuc » nhan thuc, nam thuc, nham thu
khoa khau » khoa kham, khoa phau, khoa chau
thuc cach » thuoc sach, truoc cach, thuc hanh
cach khoa » bach khoa, cac khoa, cac khoan
pho thong » he thong
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
sach nay » sach hay, sach vay, sach nang
nay thuc » nam thuc, cay thuc, day thuc
khoa pho » khoa phu, khoa khoa, khoa phau
te sach » toc sach
su sach » so sach, vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te sach nham thuc anh khoa khau thong ) or ( su sach nay thuc cach khoa pho thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach nham thuc anh khoa khau thong ) OR ( su sach nay thuc cach khoa pho thong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach nham thuc anh khoa khau thong ) or ( su sach nay thuc cach khoa pho thong ))*.