Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
hang tai » hang va, dung tai
tu sach » su sach, te sach, tu cach
cac tuc » cac toc, cac tu, cac tac
vai cua » dai cua, hai cua, lai cua
dao vai » dao van, dao va, dao bai
tai hoi » tai khoi, dai hoi, tai hai
hieu ve » hieu van
hieu va » lieu va, hieu qua
va dao » ca dao
tuc va » thuc va, truc va, tuc xa
cua te » cua tu
y hang » ly hang, ty hang, yu hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (thu sach)) y hang tai hoi. ((hieu ve) or (hieu va)) cac tuc va dao vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y hang tai hoi. ((hieu ve) OR (hieu va)) cac tuc va dao vai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) y hang tai hoi. ((hieu ve) or (hieu va)) cac tuc va dao vai cua te*".