Perhaps you should try some spelling variations:
nguoi sach » nguoi san, nuoc sach
thien van » thi van
cau tren » cu tren, dau tren, ca tren
xay hoi » tay hoi, cay phoi, gay thoi
sach ky » sac ky, sach y, sach ty
va danh » va dan, va hanh, dia danh
va dinh » van dinh, va kinh, va tinh
nam xuc » cam xuc, nam xua, nam thuc
ve cau » ke cau, va cau, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: nguoi sach ky nang ((xay hoi) OR (xa hoi)). thien van nam xuc ((va danh) or (va dinh)) ve cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nguoi sach ky nang ((xay hoi) OR (xa hoi)). thien van nam xuc ((va danh) OR (va dinh)) ve cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nguoi sach ky nang ((xay hoi) OR (xa hoi)). thien van nam xuc ((va danh) or (va dinh)) ve cau tren".
• Adding a wildcard symbol may retrieve word variants: nguoi sach ky nang ((xay hoi) OR (xa hoi)). thien van nam xuc ((va danh) or (va dinh)) ve cau tren*.