Perhaps you should try some spelling variations:
te sach » toc sach
vu sach » vu bach, su sach, vu khach
hieu va » hieu qua
va tinh » may tinh
tinh vi » trinh vi, tinh voi, tinh va
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (vu sach)) ky nang x hoi. ((hieu va) OR (lieu va)) cam xuc va tinh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (vu sach)) ky nang x hoi. ((hieu va) OR (lieu va)) cam xuc va tinh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (vu sach)) ky nang x hoi. ((hieu va) OR (lieu va)) cam xuc va tinh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (vu sach)) ky nang x hoi. ((hieu va) OR (lieu va)) cam xuc va tinh vi cua tre*.