Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
so sach » so sanh, bo sach, co sach
ky lang » ky dang, ky tang, tay lang
va cam » va cham, va cao, va cai
loc va » hoc va, luc va
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((ky lang) OR (ky nang)) xa hoi. hieu ((va cam) or (va cac)) loc va thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ky lang) OR (ky nang)) xa hoi. hieu ((va cam) OR (va cac)) loc va thanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((ky lang) OR (ky nang)) xa hoi. hieu ((va cam) or (va cac)) loc va thanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: so sach ((ky lang) OR (ky nang)) xa hoi. hieu ((va cam) or (va cac)) loc va thanh vi cua te*.