Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh ca » thanh cha, thanh cac, thanh ha
su sach » so sach, vu sach
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
cua tre » cuu tre, cua triet, dua tren
sach ky » sac ky, sach y, sach ty
va cao » va cac, va co, va dao
luc va » duc va, tuc va, loc va
va cam » va cham, va cac, va cai
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: su sach ky dang xa hoi. lieu ((va cam) or (va cao)) luc va thanh ca ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky dang xa hoi. lieu ((va cam) OR (va cao)) luc va thanh ca ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky dang xa hoi. lieu ((va cam) or (va cao)) luc va thanh ca ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sach ky dang xa hoi. lieu ((va cam) or (va cao)) luc va thanh ca ((cua tre) OR (cua te))*.