Perhaps you should try some spelling variations:
nhung cau » chung cu, nhung bai, nhu cau
thu sach » tu sach, thuat sach, thuoc sach
ty nhung » tay nhung, tu nhung, ky nhung
hanh via » hanh vi, hanh va, anh va
hieu ve » hieu va, hieu van
via cua » gia cua, gian cua, giau cua
sach ty » sach y, sach tu, sach thu
duoc ma » duoc lam
cua te » cua tu
ve tao » ve bao, de tao, ve tac

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 ty nhung cau hoi. hieu ve tao ((((duc va) or (duoc ma))) or (nuoc va)) hanh via cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nhung cau hoi. hieu ve tao ((((duc va) OR (duoc ma))) OR (nuoc va)) hanh via cua te.
• Adding a wildcard symbol may retrieve word variants: thu sach ty nhung cau hoi. hieu ve tao ((((duc va) or (duoc ma))) or (nuoc va)) hanh via cua te*.