Perhaps you should try some spelling variations:
hanh via » hanh vi, hanh va, anh va
su sach » so sach, vu sach
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
cao hoi » cau hoi, co hoi, cao hoc
hieu va » lieu va, hieu qua
y nang » ky nang, ly nang, v nang
bao bo » bac bo, nao bo, bao bi
ban bo » can bo, ban do, ban co

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 y nang cao hoi. hieu va ((bao bo) OR (ban bo)) va hanh via ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang cao hoi. hieu va ((bao bo) OR (ban bo)) va hanh via ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang cao hoi. hieu va ((bao bo) OR (ban bo)) va hanh via ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang cao hoi. hieu va ((bao bo) OR (ban bo)) va hanh via ((cua tre) or (cuu tre))*.