Perhaps you should try some spelling variations:
hieu cua » hieu qua, dieu cua, bieu cua
nhan duc » nhan duoc, nhan luc, phan duc
hieu ca » hieu cac, hieu va, hieu xa
nang xa » nang x, lang xa, nang ma
duc van » duc va, duc tan, duc manh
van anh » van thanh, tuan anh, van minh
vai cua » dai cua, hai cua, lai cua
tu sach » thu sach, su sach, te sach
y nang » ky nang, ly nang, v nang
vi cua » di cua

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