Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
duc manh » suc manh, duc anh, duc minh
hieu ve » hieu va, hieu van
ve giao » te giao, viet giao, van giao
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 ve » hanh ve, anh viet, thanh ve
anh va » hanh va

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: thuat sach y nang ((ma hoi) OR (ma hoa)). hieu ve giao duc manh ((anh ve) OR (anh va)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y nang ((ma hoi) or (ma hoa)). hieu ve giao duc manh ((anh ve) OR (anh va)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: thuat sach y nang ((ma hoi) or (ma hoa)). hieu ve giao duc manh ((anh ve) OR (anh va)) cua tre*.