Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thi hang » thi hanh, thi nang, thi hong
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
ty hang » ly hang, ty xang, 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.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (su sach)) ((ty hang) OR (thi 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: "((thuat sach) or (su sach)) ((ty hang) OR (thi hang)) x ho. hieu ve chao tu van hanh lai cua vat~".
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) or (su sach)) ((ty hang) OR (thi hang)) x ho. hieu ve chao tu van hanh lai cua vat*.