Perhaps you should try some spelling variations:
duc manh » suc manh, duc anh, duc minh
thanh ve » hanh ve, thanh va, thanh vien
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
duc van » duc va, duc tan, duc phan
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
y nang » ky nang, ly nang, v nang

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 y nang xa hoi. hieu va cham ((duc van) OR (duc manh)) thanh ve ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu va cham ((duc van) OR (duc manh)) thanh ve ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu va cham ((duc van) OR (duc manh)) thanh ve ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu va cham ((duc van) OR (duc manh)) thanh ve ((cua tre) or (cuu tre))*.