Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thong
sach tranh » canh tranh
tranh thuc » trinh thuc, trang thuc, thanh thuy
bach thoan » hach toan, bach khoa, bach hoa
thoan toan » thoan tran, thuat toan, thanh toan
thuc cach » thuoc sach, truoc cach, thuc hanh
cach khoi » cach thoi, cac khoi, cac thoi
khoi phau » khoa phau, khoai chau, khai pha
thuc bach » truc bach, thuoc sach, thuc hanh
dao thuc » dan thuc, dao tuc, do thuc
tu lanh » tu hanh, tu lenh, tu manh
te sach » toc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu lanh dao thuc cach khoi phau thong ) or ( te sach tranh thuc bach thoan toan thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu lanh dao thuc cach khoi phau thong ) OR ( te sach tranh thuc bach thoan toan thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu lanh dao thuc cach khoi phau thong ) or ( te sach tranh thuc bach thoan toan thong ))*.