Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
ly vang » ly van, ly quang
ly hang » ly quang
hieu va » lieu va, hieu qua
cac toc » cac toi, cac nuoc, cac thoi
va danh » va dinh, va dan, va hanh
danh du » danh dau, danh tu, dinh du
toc va » hoc va, toc ta, tuc va
du cua » duy cua, dau cua, dum cua
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: vu sach ((ly vang) or (ly hang)) xa hoi. hieu va cac toc va danh du cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ly vang) OR (ly hang)) xa hoi. hieu va cac toc va danh du cua te.
• Adding a wildcard symbol may retrieve word variants: vu sach ((ly vang) or (ly hang)) xa hoi. hieu va cac toc va danh du cua te*.