Perhaps you should try some spelling variations:
dieu cua » dieu tra
gia cua » gian cua, giau cua, gia cuc
van anh » van thanh, tuan anh, van minh
duc van » duc va, duc tan, duc manh
tu sach » thu sach, su sach, te sach
y nang » ky nang, ly nang, v nang
ve cao » va cao, ve bao, ve co
ve cac » va cac, vien cac
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 sach y nang x hoi. hieu ((ve cao) OR (ve cac)) duc van anh ((dieu cua) or (gia cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. hieu ((ve cao) OR (ve cac)) duc van anh ((dieu cua) OR (gia cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang x hoi. hieu ((ve cao) OR (ve cac)) duc van anh ((dieu cua) or (gia cua)) triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu ((ve cao) OR (ve cac)) duc van anh ((dieu cua) or (gia cua)) triet*.