Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
dai tren » dat tren, dau tren, dan tren
tu sach » thu sach, su sach, te sach
mang xa » lang xa, mang may, dang xay
hieu va » lieu va
cau xuc » cam xuc, cau truc, chat xuc
cau luc » cau truc, cau phuc
y mang » cay mang
vi dai » si dai, li dai, vien dai

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) OR (hieu qua)) ((cau xuc) or (cau luc)) van hanh vi dai tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y mang xa hoi. ((hieu va) OR (hieu qua)) ((cau xuc) OR (cau luc)) van hanh vi dai tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y mang xa hoi. ((hieu va) OR (hieu qua)) ((cau xuc) or (cau luc)) van hanh vi dai tren*".