Perhaps you should try some spelling variations:
dua tren » dung tren
can thuc » dan thuc, van thuc, cay thuc
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hang di » hang doi, hang vi, hang dien
va hang » van hang, va nang, va lang
cuu tre » cua tre, cau tren, cau treo
cac thu » cach thuc, cac thoi
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang

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 ky lang xa hoi. hieu ve ((cac thu) or (can thuc)) va hang di ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky lang xa hoi. hieu ve ((cac thu) OR (can thuc)) va hang di ((dua tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. hieu ve ((cac thu) or (can thuc)) va hang di ((dua tren) or (cuu tre))*.