Perhaps you should try some spelling variations:
soc danh » hoc danh, so danh, sach danh
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
tai cua » thai cua, tai cuc, tri cua
tai cuu » tai cuc, tai buu, thai cua
soc dan » hoc dan, so dan, sac dan
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky lang xa hoi. hieu ve cham ((soc danh) OR (soc dan)) thanh ((tai cuu) or (tai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky lang xa hoi. hieu ve cham ((soc danh) OR (soc dan)) thanh ((tai cuu) OR (tai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky lang xa hoi. hieu ve cham ((soc danh) OR (soc dan)) thanh ((tai cuu) or (tai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky lang xa hoi. hieu ve cham ((soc danh) OR (soc dan)) thanh ((tai cuu) or (tai cua)) tre*.