Perhaps you should try some spelling variations:
thien van » thi van
bach tuoc » sach duoc, sach nuoc
van bach » van bac, van hach, van sach
so sach » bo sach, co sach, hoc sach
so sanh » do sanh
nang xa » nang x, lang xa, nang ma
tuoc va » thuoc va, nuoc va, duoc va
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
v nang » va nang, vu nang, van nang
di cua » dai cua, doi cua, de cua

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

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