Perhaps you should try some spelling variations:
trinh thuc » trinh tu, trinh thi
sach trinh » sach tranh, hanh trinh, sach kinh
khoan phai » khong phai, khoa phau, khoan hoi
phai tuong » phan thuong, pham thuong, pham truong
sach tien » sach tren, sach thieu
tien thuc » trien thuc, kien thuc, bien thuc
thuc cach » thuoc sach, truoc cach, thuc hanh
pho thong » he thong
cach pho » cach pha, cach phong, cach thoi
thuc cac » tuc cac, phuc cac, thac cac
su sach » so sach, vu sach
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: (( su sach tien thuc cach pho thong thong ) or ( te sach trinh thuc cac khoan phai tuong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach tien thuc cach pho thong thong ) OR ( te sach trinh thuc cac khoan phai tuong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach tien thuc cach pho thong thong ) or ( te sach trinh thuc cac khoan phai tuong ))*.