Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
hanh via » hanh vi, hanh va, anh va
hang cau » hang dau, hang ca, nhung cau
tu sach » su sach, te sach, tu cach
duoc va » nuoc va, duc va, duoc ma
via cua » gia cua, gian cua, giau cua
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
ty hang » ly hang, ty xang, thi hang
cua te » cua tu

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) OR (thu sach)) ty hang cau hoi. ((hieu ve) or (lieu va)) tao duoc va hanh via cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty hang cau hoi. ((hieu ve) OR (lieu va)) tao duoc va hanh via cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ty hang cau hoi. ((hieu ve) or (lieu va)) tao duoc va hanh via cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ty hang cau hoi. ((hieu ve) or (lieu va)) tao duoc va hanh via cua te*.