Perhaps you should try some spelling variations:
truc ban » thuc ban, truc dan, truc van
thanh ve » thanh va, thanh vien, thanh van
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
truc va » thuc va, thuc vat, trung va
hanh ve » hanh vi, hanh va, hanh kem
y lang » o lang, _ lang, tay lang
va cau » van cau, va cac, va dau

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: tu sach y lang xa hoi. hieu va cau ((truc ban) OR (truc va)) ((thanh ve) OR (hanh ve)) cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang xa hoi. hieu va cau ((truc ban) or (truc va)) ((thanh ve) OR (hanh ve)) cua vat~".
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. hieu va cau ((truc ban) or (truc va)) ((thanh ve) OR (hanh ve)) cua vat*.