Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thong
thuc cach » thuoc sach, truoc cach, thuc hanh
cach thoi » cac thoi, cach thuc, cach noi
thoi khoi » thoat khoi, hoi khoa, hoc khoi
sach truc » cach thuc, sach tren, sach thu
cach khoa » bach khoa, cac khoa, cac khoan
khoa phau » hoa phan, khoa kham, khoa than
sach bai » sach dao, cac bai, sach xa
bai thuc » bai thuoc, bao thuc, dai thuc
so sach » so sanh, bo sach, co sach
tu sach » thu sach, su sach, te sach
truc va » thuc va, thuc vat, trung va
va cach » va cac
khong » phong

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 bai thuc cach thoi khoi khong ) or ( tu sach truc va cach khoa phau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sach bai thuc cach thoi khoi khong ) OR ( tu sach truc va cach khoa phau thong )).
• Adding a wildcard symbol may retrieve word variants: (( so sach bai thuc cach thoi khoi khong ) or ( tu sach truc va cach khoa phau thong ))*.