Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
cao hoi » cau hoi, co hoi, cao hoc
ty nang » ky nang, ty xang, ty hang
xuc va » duc va, tuc va, xac va
va cao » va cac, va co, va dao
luc va » duc va, tuc va, loc va

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 ty nang cao hoi. lieu va cao ((xuc va) or (luc va)) hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang cao hoi. lieu va cao ((xuc va) OR (luc va)) hanh vi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: su sach ty nang cao hoi. lieu va cao ((xuc va) or (luc va)) hanh vi ((cua tre) or (cuu tre))*.