Perhaps you should try some spelling variations:
cau theo » cau thi, cau tao
hieu cao » chieu cao, hieu cac, hieu ca
chat hoc » chat hoa, chat thom, vat hoc
cau tren » cu tren, dau tren, ca tren
danh vi » hanh vi, dinh vi, danh di
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
cho hoc » co hoc, khoa hoc
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 cao ((chat hoc) OR (cho hoc)) va danh vi ((cau tren) OR (cau theo))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky lang xa hoi. hieu cao ((chat hoc) OR (cho hoc)) va danh vi ((cau tren) or (cau theo))~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky lang xa hoi. hieu cao ((chat hoc) OR (cho hoc)) va danh vi ((cau tren) or (cau theo))*.