Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
vu sach » vu bach, su sach, vu khach
lang xa » lang ha, dang xay, lang van
hieu va » lieu va
van cua » vang cua, ban cua, dan cua
y lang » o lang, _ lang, tay lang
luc va » duc va, tuc va, loc va
cua te » cua tu

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: vu sach y lang xa hoi. ((hieu va) OR (hieu qua)) cac ((luc va) OR (hoc va)) thanh van cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y lang xa hoi. ((hieu va) OR (hieu qua)) cac ((luc va) or (hoc va)) thanh van cua te~".
• Adding a wildcard symbol may retrieve word variants: vu sach y lang xa hoi. ((hieu va) OR (hieu qua)) cac ((luc va) or (hoc va)) thanh van cua te*.