Perhaps you should try some spelling variations:
thai thong » thoai thong, thai hong, thai phong
thuc cach » thuoc sach, truoc cach, thuc hanh
phan tong » phan trong, phan cong, han tong
xay thuc » cay thuc, day thuc, xa thuc
cach hoc » cach thuc, cach thoi, dich hoc
hoc phan » hoc dan, hoc pho
sanh dai » sinh dai, sanh dan, vanh dai
hoc sach » hoc sinh, hoc cac, hoc anh
sach hoa » sach ha, sach hoi, bach hoa
hoa thai » hong thai, hoa phan, hoa chat
so sanh » do sanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu hoach xay thuc cach hoc phan tong ) or ( so sanh dai hoc sach hoa thai thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach xay thuc cach hoc phan tong ) OR ( so sanh dai hoc sach hoa thai thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu hoach xay thuc cach hoc phan tong ) or ( so sanh dai hoc sach hoa thai thong ))*.