Perhaps you should try some spelling variations:
van dinh » van minh, van dich, va dinh
dinh doi » dinh moi, tinh doi, dinh toi
cua tre » cua te, cuu tre, cua triet
ky sang » ky nang, ky dang, ky tang
doi cua » dai cua, hoi cua
dai hoi » dai hoc, dai hai, dai moi
duc van » duc va, duc tan, duc manh
va cam » va cham, va cac, va cao
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, ve cai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky sang ((ma hoi) OR (dai hoi)). hieu ((ve cam) OR (va cam)) duc van dinh doi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky sang ((ma hoi) or (dai hoi)). hieu ((ve cam) OR (va cam)) duc van dinh doi cua tre~".
• Adding a wildcard symbol may retrieve word variants: vu sac ky sang ((ma hoi) or (dai hoi)). hieu ((ve cam) OR (va cam)) duc van dinh doi cua tre*.