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