Perhaps you should try some spelling variations:
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
cac xuc » cam xuc, chat xuc, cac cuoc
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
dan va » doan va, dan ca, ban va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky lang xa hoi. hieu ve ((cac xuc) or (cac nuoc)) cam ((gan vi) or (dan va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky lang xa hoi. hieu ve ((cac xuc) OR (cac nuoc)) cam ((gan vi) OR (dan va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach ky lang xa hoi. hieu ve ((cac xuc) or (cac nuoc)) cam ((gan vi) or (dan va)) cua tre*.