Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
vu sach » vu bach, su sach, vu khach
ky lang » ky dang, ky tang, tay lang
hieu ve » hieu va, hieu van
va chua » vua chua, ca chua, va chu
co luc » coc luc, co luy
luc va » duc va, tuc va, loc va
va cua » via cua, ca cua, ma cua
ve co » vo co, va co, de co

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

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