Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
hieu va » hieu qua
cam tuc » cam xuc, cam tu, nam thuc
xa dung » xay dung, va dung, a dung
xa dong » ha dong, van dong, lao dong
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
co cua » con cua, ca cua, cong 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: vu sach y nang x hoi. ((hieu va) or (lieu va)) cam tuc ((xa dung) OR (xa dong)) co cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang x hoi. ((hieu va) OR (lieu va)) cam tuc ((xa dung) OR (xa dong)) co cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang x hoi. ((hieu va) or (lieu va)) cam tuc ((xa dung) OR (xa dong)) co cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang x hoi. ((hieu va) or (lieu va)) cam tuc ((xa dung) OR (xa dong)) co cua tre*.