Perhaps you should try some spelling variations:
khoanh khac » khoa khac
cac khoanh » cac thanh, cac doanh, coc khoan
khoan phai » khong phai, khoa phau, khoan hoi
phai tuong » phan thuong, pham thuong, pham truong
khac tong » khac trong, khac tung, khau tong
sach tren » sach tien, sach tranh
sach tri » sach tai, sach truc, sach bai
tri thuc » tri tue
thuc cac » thuc cach, tuc cac, phuc cac
tren tue » tren que, tren thuc, tri tue
su sach » so sach, vu sach
tue cac » tu cac, tuc cac, te 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 tri thuc cac khoanh khac tong ) or ( su sach tren tue cac khoan phai tuong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach tri thuc cac khoanh khac tong ) OR ( su sach tren tue cac khoan phai tuong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach tri thuc cac khoanh khac tong ) or ( su sach tren tue cac khoan phai tuong ))*.