Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
va chua » vua chua, ca chua, va chu
ve cam » ve cham, ve cac, va cam
va cua » via cua, ca cua, ma 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 sach ky nang x hoi. hieu ((ve cam) or (va cac)) duc va thanh ((va cua) OR (va chua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu ((ve cam) OR (va cac)) duc va thanh ((va cua) OR (va chua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu ((ve cam) or (va cac)) duc va thanh ((va cua) OR (va chua)) te".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu ((ve cam) or (va cac)) duc va thanh ((va cua) OR (va chua)) te*.