Perhaps you should try some spelling variations:
khoan phai » khong phai, khoa phau, khoan hoi
phai thong » phap thong, phai tuong, khai thuong
truc thuoc » thuc thuc, tri thuoc, tu thuoc
thuoc hach » thuoc sach, thuoc thanh, thuc hanh
phan thong » phan thuong, phan hong, phan tong
cach truc » cach thuc, sach truc, cau truc
hach toan » thanh toan, manh toan
toan phan » thanh phan, toan ban, hoa phan
sach thi » sach thu, sach tai, sach thieu
thi truc » thi trac, thi thuc, phim truc
truc cac » tuc cac, truc cau, truoc cach
su sach » so sach, vu sach
tu cach » tu cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach thi truc cac khoan phai thong ) or ( tu cach truc thuoc hach toan phan thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach thi truc cac khoan phai thong ) OR ( tu cach truc thuoc hach toan phan thong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach thi truc cac khoan phai thong ) or ( tu cach truc thuoc hach toan phan thong ))*.