Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
tru nang » tra nang, tri nang, thi nang
hieu va » lieu va, hieu qua
dao duc » giao duc, tao duoc
va dinh » van dinh, va kinh, va tinh
via cua » gia cua, gian cua, giau cua
va dao » ca dao
va cua » va chua, ca cua, ma cua

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 ((tru nang) or (truc nano)) xa hoi. hieu va dao duc va dinh ((va cua) OR (via cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((tru nang) OR (truc nano)) xa hoi. hieu va dao duc va dinh ((va cua) OR (via cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((tru nang) or (truc nano)) xa hoi. hieu va dao duc va dinh ((va cua) OR (via cua)) te".
• Adding a wildcard symbol may retrieve word variants: thu sach ((tru nang) or (truc nano)) xa hoi. hieu va dao duc va dinh ((va cua) OR (via cua)) te*.