Perhaps you should try some spelling variations:
phan duc » pham duc, phan tu, phan dau
tu sach » thu sach, su sach, te sach
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
vi cua » vai cua, di cua
cua te » cua tu
hieu 2 » hieu n2, hieu _, hieu y
hieu d » dieu d, hieu _, hieu y

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) or (so sach)) ky nang xa hoi. ((hieu d) OR (hieu 2)) phan duc va danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (so sach)) ky nang xa hoi. ((hieu d) OR (hieu 2)) phan duc va danh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (so sach)) ky nang xa hoi. ((hieu d) OR (hieu 2)) phan duc va danh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (so sach)) ky nang xa hoi. ((hieu d) OR (hieu 2)) phan duc va danh vi cua te*.