Perhaps you should try some spelling variations:
dang xay » dang van, van xay
va thanh » gia thanh, ban thanh, le thanh
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
lam xuc » cam xuc, lam duoc
hai cua » thai cua, dai cua, hoi cua
va tinh » may tinh
van lam » van nam
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
su sach » so sach, vu sach
su sac » su cac, su xac

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

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