Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
va thanh » gia thanh, ban thanh, va tinh
dang xay » dang van, van xay
va dinh » van dinh, va kinh, va tinh
cua tre » cua te, cuu tre, cua triet
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
sac ky » cac ky, sai ky
di cua » dai cua, doi cua, de cua
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky dang xay hoi. hieu va cac xuc ((van hanh) or (((va thanh) or (va dinh)))) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky dang xay hoi. hieu va cac xuc ((van hanh) OR (((va thanh) OR (va dinh)))) di cua tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky dang xay hoi. hieu va cac xuc ((van hanh) or (((va thanh) or (va dinh)))) di cua tre*.