Perhaps you should try some spelling variations:
khoan phu » khoa phu, khoan phai, khoa thu
phu thong » pho thong, phap thong, khau thong
sach tron » sach tren, sach tranh, sanh trong
tron thuc » trong thuc, toan thuc, trong thu
thuc cach » thuoc sach, truoc cach, thuc hanh
cach hoai » cach hoan, cac loai, cach noi
thu tuong » tu tuong, thu huong, thuy duong
khac tri » khac trai, khac thi, khac triet
tri thac » tri thuc, tri tac, tri tham
thac cac » thoai cac, thanh cac, hoc cac
hoai thu » doi thu
vu khac » vu kham, vu khanh, bui khac
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: (( vu khac tri thac cac khoan phu thong ) or ( tu sach tron thuc cach hoai thu tuong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( vu khac tri thac cac khoan phu thong ) OR ( tu sach tron thuc cach hoai thu tuong )).
• Adding a wildcard symbol may retrieve word variants: (( vu khac tri thac cac khoan phu thong ) or ( tu sach tron thuc cach hoai thu tuong ))*.