Perhaps you should try some spelling variations:
thi hang » thi hanh, thi nang, thi hong
tu sach » thu sach, su sach, te sach
va tinh » may tinh
ty hang » ly hang, ty xang, thu hang
hieu ve » hieu va, hieu van
cac luc » cau luc, coc luc, cac nuoc
tinh vi » trinh vi, tinh voi, tinh va
cua te » cua tu
ve cac » va cac, vien cac
luc va » duc va, tuc va, loc 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: tu sach ((ty hang) OR (thi hang)) xa hoi. hieu ve cac luc va tinh vi ((cua te) OR (qua su))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty hang) OR (thi hang)) xa hoi. hieu ve cac luc va tinh vi ((cua te) or (qua su))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty hang) OR (thi hang)) xa hoi. hieu ve cac luc va tinh vi ((cua te) or (qua su))*.