Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach ly » sach y, sach lo, sach ty
ly vang » ly hang, ly van, ly quang
hieu va » lieu va, hieu qua
lam hoc » am hoc, lam hoa, tam hoc
danh du » danh dau, danh tu, anh du
dinh du » dinh duc, dinh cu, dinh tu
cu tren » tu tren, dua tren
ma hoi » mai hoi, ma hoa, me hoi
va lam » van lam, va lap

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 ly vang ((ma hoi) or (xa hoi)). hieu va lam hoc va ((danh du) OR (dinh du)) cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ly vang ((ma hoi) OR (xa hoi)). hieu va lam hoc va ((danh du) OR (dinh du)) cu tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ly vang ((ma hoi) or (xa hoi)). hieu va lam hoc va ((danh du) OR (dinh du)) cu tren".
• Adding a wildcard symbol may retrieve word variants: thu sach ly vang ((ma hoi) or (xa hoi)). hieu va lam hoc va ((danh du) OR (dinh du)) cu tren*.