Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
sach thi » sach thu, sach tai, sach thieu
thi hanh » thi thanh
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
hieu ve » hieu van
hanh xa » hanh va, hanh ma, hanh xu

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 thi hanh xa hoi. ((hieu ve) or (hieu va)) am thuc ((va hanh) OR (va danh)) vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thi hanh xa hoi. ((hieu ve) OR (hieu va)) am thuc ((va hanh) OR (va danh)) vai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thi hanh xa hoi. ((hieu ve) or (hieu va)) am thuc ((va hanh) OR (va danh)) vai cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sach thi hanh xa hoi. ((hieu ve) or (hieu va)) am thuc ((va hanh) OR (va danh)) vai cua viet*.