Perhaps you should try some spelling variations:
thien van » thi van
so sach » so sanh, bo sach, co sach
van cac » van hac, van cau, van bac
v nang » va nang, vu nang, van nang
tuc va » thuc va, truc va, duc va
vi cua » vai cua, di cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu bach) or (so sach)) v nang x hoi. thien van cac ((tuc va) or (tuc xa)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu bach) OR (so sach)) v nang x hoi. thien van cac ((tuc va) OR (tuc xa)) hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: ((vu bach) or (so sach)) v nang x hoi. thien van cac ((tuc va) or (tuc xa)) hanh vi cua te*.