Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
thanh doi » thanh loi, thanh moi, thanh do
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
doi cua » dai cua, hoi cua
y nang » ky nang, ly nang, v nang
va cam » va cham, va cao, va cai
cua su » qua su

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 y nang xa hoi. lieu ((va cam) OR (va cac)) hoc dan thanh doi cua su~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang xa hoi. lieu ((va cam) OR (va cac)) hoc dan thanh doi cua su".
• Adding a wildcard symbol may retrieve word variants: so sach y nang xa hoi. lieu ((va cam) OR (va cac)) hoc dan thanh doi cua su*.