Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
tu sach » thu sach, su sach, te sach
mang xa » lang xa, mang may, dang xay
qua cau » quan cau, qua cac, qua ca
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
y mang » cay mang
vi dau » vi dai, va dau, bi dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y mang xa hoi. hieu qua cau ((xuc van) or (duc van)) hanh vi dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y mang xa hoi. hieu qua cau ((xuc van) OR (duc van)) hanh vi dau tren.
• Adding a wildcard symbol may retrieve word variants: tu sach y mang xa hoi. hieu qua cau ((xuc van) or (duc van)) hanh vi dau tren*.