Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
chao tu » chao xu, cho tu, cao tu
ve chao » ve chat, ve cham, ve cho
hieu ve » hieu va, hieu van
lai cua » dai cua, hai cua, lai chau
ly hang » ly quang
ty hang » ty xang, thi hang, thu hang
su sach » so sach, vu sach
tu van » tu va

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) or (su sach)) ((ty hang) OR (ly hang)) x ho. hieu ve chao tu van hanh lai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (su sach)) ((ty hang) OR (ly hang)) x ho. hieu ve chao tu van hanh lai cua vat*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (su sach)) ((ty hang) OR (ly hang)) x ho. hieu ve chao tu van hanh lai cua vat*".