Perhaps you should try some spelling variations:
duc minh » duc anh
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
va cham » va chat, va tham
duc van » duc va, duc tan, duc manh
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
vi cua » vai cua
di cua » dai cua, doi cua, de cua
o hoi » co hoi, o hoc, o hai

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