Perhaps you should try some spelling variations:
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
soc van » oc van, sac van, soc dan
hoc van » hoc dan, hoc va, hoc vat
san cuu » san cua, song cuu, sang cua
san huu » tran huu, phan huu, san khau
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 dang xa hoi. hieu vu cham ((soc van) or (hoc van)) thanh ((san cuu) OR (san huu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang xa hoi. hieu vu cham ((soc van) OR (hoc van)) thanh ((san cuu) OR (san huu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky dang xa hoi. hieu vu cham ((soc van) or (hoc van)) thanh ((san cuu) OR (san huu)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang xa hoi. hieu vu cham ((soc van) or (hoc van)) thanh ((san cuu) OR (san huu)) tre*.