Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
thuc cach » thuoc sach, truoc cach, thuc hanh
cach thoi » cac thoi, cach thuc, cach noi
thua cach » thuat sach, thuat canh, thuat mach
cach hoan » cac khoan, hach toan, sach han
sac tham » sach tham, sac thai, hoac tham
thoi pho » hoc pho, doi pho, hoi tho
sach dao » lanh dao
dao thua » dai thua, tao thuan, dao thi
tu sach » thu sach, su sach, te sach
hoan he » hoa he, toan he, hoan thue
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te sac tham thuc cach thoi pho thong ) or ( tu sach dao thua cach hoan he thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sac tham thuc cach thoi pho thong ) OR ( tu sach dao thua cach hoan he thong )).
• Adding a wildcard symbol may retrieve word variants: (( te sac tham thuc cach thoi pho thong ) or ( tu sach dao thua cach hoan he thong ))*.