Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cau tren » cu tren, dau tren, ca tren
dang xa » dang xay, lang xa, dang ha
hieu ve » hieu van
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
va dinh » van dinh, va kinh, vu dinh
va tinh » may tinh
ky dang » ky nang, ky danh
vai cau » va cau, van cau, vai cac

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

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