Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
hanh ve » hanh vi, hanh va
xuc van » duc van, luc van, vuc van
cao xuc » cam xuc, cao duc, cao suc
sach vu » sach va, sach tu, sach uu
hieu va » lieu va, hieu qua
nang xa » lang xa, nang ma, mang xa
su hien » su kien, su tien, thu hien
va cao » va cac, va co, va dao
kem » kiem

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 vu ((nang xa) OR (nang x)) hoi. hieu va cao xuc van ((hanh ve) or (hanh kem)) su hien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach vu ((nang xa) OR (nang x)) hoi. hieu va cao xuc van ((hanh ve) OR (hanh kem)) su hien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach vu ((nang xa) OR (nang x)) hoi. hieu va cao xuc van ((hanh ve) or (hanh kem)) su hien".
• Adding a wildcard symbol may retrieve word variants: tu sach vu ((nang xa) OR (nang x)) hoi. hieu va cao xuc van ((hanh ve) or (hanh kem)) su hien*.