Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
ban thanh » ban hanh, ban hang
sach ly » sach y, sach lo, sach ty
va hanh » van hanh, va thanh, va danh
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » lieu va, hieu qua
ly hang » ly quang
hieu ve » hieu van
va hoi » xa hoi, va hoc, va hoa
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ly hang va hoi. ((hieu ve) OR (hieu va)) cac xuc ((va hanh) or (ban thanh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ly hang va hoi. ((hieu ve) OR (hieu va)) cac xuc ((va hanh) OR (ban thanh)) vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ly hang va hoi. ((hieu ve) OR (hieu va)) cac xuc ((va hanh) or (ban thanh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ly hang va hoi. ((hieu ve) OR (hieu va)) cac xuc ((va hanh) or (ban thanh)) vi cua te*.