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

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