Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cuoc van » cuoi van, luoc van, quoc van
cac cuoc » cac nuoc, ca cuoc, cac quoc
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, me hoi
anh vi » hanh vi, anh va, anh vu
anh ve » hanh ve, anh va, anh viet
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach y nang ((ma hoi) or (ma hoa)). hieu ve cac cuoc van ((anh vi) or (anh ve)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y nang ((ma hoi) OR (ma hoa)). hieu ve cac cuoc van ((anh vi) OR (anh ve)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thuat sach y nang ((ma hoi) or (ma hoa)). hieu ve cac cuoc van ((anh vi) or (anh ve)) cua tre*.