Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
dau tren » dau tien, dat tren, dau tieng
lang xa » lang ha, dang xay, lang van
qua cau » quan cau, qua cac, qua ca
xuc van » duc van, vuc van, xuc ban
luc van » luoc van, luu van, duc van
hanh va » hang va, hanh vi
va dau » va dao

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach _ lang xa hoi. hieu qua cau ((xuc van) OR (luc van)) hanh va dau tren~".
• Adding a wildcard symbol may retrieve word variants: thuat sach _ lang xa hoi. hieu qua cau ((xuc van) OR (luc van)) hanh va dau tren*.