Perhaps you should try some spelling variations:
thien van » thi van
bac tuoc » bach tuoc, tac thuoc, bac hoc
tuoc may » hoc may, duoc ma, tao may
su sach » so sach, vu sach
so sanh » do sanh
nang xa » nang x, lang xa, nang ma
van bac » van ban, van bao, van hac
tinh di » tinh doi, trinh di, tinh da
cuu tre » cua tre, cau tren, cau treo
v nang » va nang, vu nang, van nang
di cuu » di cau, di cua, dinh cuu

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

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