Perhaps you should try some spelling variations:
phan duc » pham duc, phan tu, phan dau
hieu ve » hieu va, hieu van
ve phan » va phan, ke phan, ve phat
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
san ky » sang ky, van ky, ban ky
dan ky » van ky
vi cua » di cua
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((san ky) or (dan ky)) nang x hoi. hieu ve phan duc va hanh ((vi cua) OR (vai cua)) cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((san ky) OR (dan ky)) nang x hoi. hieu ve phan duc va hanh ((vi cua) OR (vai cua)) cu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((san ky) or (dan ky)) nang x hoi. hieu ve phan duc va hanh ((vi cua) OR (vai cua)) cu*".