Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu ve » hieu va, hieu van
ve giao » te giao, viet giao, van giao
duc van » duc va, duc tan, duc manh
van anh » van thanh, tuan anh, van minh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, me hoi
ve cua » le cua, te cua, ve cum
de cua » le cua, te cua, dieu cua

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 van anh ((ve cua) OR (de 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 van anh ((ve cua) OR (de cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: thuat sach y nang ((ma hoi) or (ma hoa)). hieu ve giao duc van anh ((ve cua) OR (de cua)) tre*.