Perhaps you should try some spelling variations:
phan thong » phan thuong, phan hong, phan tong
thuc cach » thuoc sach, truoc cach, thuc hanh
cach khoi » cach thoi, cac khoi, cac thoi
khoi phan » hoi phan, phoi phan, hoc phan
sach tren » sach tien, sach tranh
tren thuc » trien thuc, tron thuc, trinh thuc
thuc hach » thuc hanh, chuc hach, thuoc sach
hach toan » thanh toan, manh toan
toan toan » toan tran, thanh toan, toan doanh
dao thuc » dan thuc, dao tuc, do thuc
tu lanh » tu hanh, tu lenh, tu manh
tu sach » thu sach, su sach, te 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 phan thong ) or ( tu sach tren thuc hach toan toan thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu lanh dao thuc cach khoi phan thong ) OR ( tu sach tren thuc hach toan toan thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu lanh dao thuc cach khoi phan thong ) or ( tu sach tren thuc hach toan toan thong ))*.