Perhaps you should try some spelling variations:
bach tuoc » sach duoc, sach nuoc
thien van » thi van
van bach » van bac, van hach, van sach
van hanh » van thanh, ban hanh, van anh
va hanh » va thanh, va danh, ban hanh
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
so sanh » do sanh
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: ((su sach) or (so sanh)) v nang xa hoi. thien van bach tuoc ((va hanh) OR (van hanh)) di cua 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 bach tuoc ((va hanh) OR (van hanh)) di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) v nang xa hoi. thien van bach tuoc ((va hanh) OR (van hanh)) di cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) v nang xa hoi. thien van bach tuoc ((va hanh) OR (van hanh)) di cua tre*.