Perhaps you should try some spelling variations:
chong phap » phuong phap
cach chong » cach chung, cach phong, cac cong
phap thong » phap phong, phap chong, pho thong
sach tron » sach tren, sach tranh, sanh trong
tron thuc » trong thuc, toan thuc, trong thu
khoan phu » khoa phu, khoan phai, khoa thu
phu thong » pho thong, khau thong, phan thong
thuc cach » thuoc sach, truoc cach, thuc hanh
thuc cac » tuc cac, phuc cac, thac cac
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: (( te sach tron thuc cac khoan phu thong ) or ( te sach tron thuc cach chong phap thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tron thuc cac khoan phu thong ) OR ( te sach tron thuc cach chong phap thong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach tron thuc cac khoan phu thong ) or ( te sach tron thuc cach chong phap thong ))*.