Perhaps you should try some spelling variations:
nang ma » tang ma, sang ma, nang cao
cac xuc » cam xuc, cac nuoc, chat xuc
hieu ve » hieu va, hieu van
sach ky » sac ky, sach ty, sach kem
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, mang xa
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau
ca cua » co cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sach y)) ((nang xa) OR (nang ma)) hoi. hieu ve cac xuc va dan ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) ((nang xa) OR (nang ma)) hoi. hieu ve cac xuc va dan ca cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach y)) ((nang xa) OR (nang ma)) hoi. hieu ve cac xuc va dan ca cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) ((nang xa) OR (nang ma)) hoi. hieu ve cac xuc va dan ca cua tre*.