Perhaps you should try some spelling variations:
phau thong » phap thong, phan thong, phan thuong
khau thong » khau thuong, khap thong, khau tong
sach tham » sach nha
tham thuc » nham thuc, pham thuc, tam thuc
thuc bach » truc bach, thuc cach, thuoc sach
bach khoa » anh khoa
khoa khau » khoa kham, khoa chau, khoa khac
canh khoa » anh khoa, xanh khoa, doanh khoa
khoa phau » hoa phan, khoa kham, khoa than
sach tai » sach bai, sach dao, sach xa
thu canh » thuc hanh, thu cong, thu ban
so sach » so sanh, bo sach, co sach
tai thu » thi thu, tai khu, tai thi

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 tham thuc bach khoa khau thong ) or ( so sach tai thu canh khoa phau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sach tham thuc bach khoa khau thong ) OR ( so sach tai thu canh khoa phau thong )).
• Adding a wildcard symbol may retrieve word variants: (( so sach tham thuc bach khoa khau thong ) or ( so sach tai thu canh khoa phau thong ))*.