Perhaps you should try some spelling variations:
phai thong » phap thong, phai tuong, phan thong
thieu tuc » hieu tuc, thu tuc, thien tu
khoa khau » khoa kham, khoa phau, khoa chau
khau tong » khau thong, khau cong, khau thuong
cach tham » sach tham, cach thuc, cach pha
tham thuc » nham thuc, pham thuc, tam thuc
thuc cach » thuoc sach, truoc cach, thuc hanh
cach hoan » cac khoan, hach toan, sach han
hoan phai » khoan phai, toan phai, hoang thai
cac khoa » cac khoan, cac khoi, dac khoa
su sach » so sach, vu sach
tuc cac » tu cac, tich cac
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 thieu tuc cac khoa khau tong ) or ( tu cach tham thuc cach hoan phai thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach thieu tuc cac khoa khau tong ) OR ( tu cach tham thuc cach hoan phai thong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach thieu tuc cac khoa khau tong ) or ( tu cach tham thuc cach hoan phai thong ))*.