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
hieu va » lieu va, hieu qua
cau xuc » cau luc, cau truc, chat xuc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
y mang » cay mang
va dau » va dao

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 va ((cau xuc) or (cam xuc)) va hanh va dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y mang xa hoi. hieu va ((cau xuc) OR (cam xuc)) va hanh va dau tren.
• Adding a wildcard symbol may retrieve word variants: tu sach y mang xa hoi. hieu va ((cau xuc) or (cam xuc)) va hanh va dau tren*.