Perhaps you should try some spelling variations:
vat dung » van dung, va dung, viet dung
cua tre » cua te, cuu tre, cua triet
xuc vat » thuc vat, xuat vat
so sach » so sanh, bo sach, co sach
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu ve » hieu van
dung co » dung cho, dung cong, dung cua
hieu va » lieu va, hieu qua
co cua » con cua, ca cua, cong cua
so sac » so dac

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

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