Perhaps you should try some spelling variations:
chat thom » chat thai, chat hoa, chat cho
cau theo » cau thi, cau tao
hieu van » hieu va, thien van, lieu va
chat hoc » chat hoa, cho hoc, vat hoc
danh vi » hanh vi, dinh vi, danh di
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
cuu tre » cua tre, cau tren, cau treo
va danh » va dinh, va dan, va hanh
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky lang xa hoi. hieu van ((chat hoc) OR (chat thom)) va danh vi ((cuu tre) OR (cau theo))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky lang xa hoi. hieu van ((chat hoc) OR (chat thom)) va danh vi ((cuu tre) or (cau theo))~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky lang xa hoi. hieu van ((chat hoc) OR (chat thom)) va danh vi ((cuu tre) or (cau theo))*.