Perhaps you should try some spelling variations:
thien van » thi van
nam duoc » nam thuoc, da duoc, dat duoc
va thanh » gia thanh, ban thanh, le thanh
thi hanh » thi thanh
va tinh » may tinh
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
de cuu » 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: tu sach y nang xa hoi. ((thien van) or (thi hanh)) nam duoc ((va thanh) OR (va tinh)) de cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. ((thien van) OR (thi hanh)) nam duoc ((va thanh) OR (va tinh)) de cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. ((thien van) or (thi hanh)) nam duoc ((va thanh) OR (va tinh)) de cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. ((thien van) or (thi hanh)) nam duoc ((va thanh) OR (va tinh)) de cuu tre*.