Perhaps you should try some spelling variations:
cau theo » cau thi, cau tao
cau tren » cu tren, dau tren, ca tren
chat hoc » chat hoa, chat thom, cho hoc
hieu cao » chieu cao, hieu cac, hieu ca
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
tu san » thu san, tu ban, tu can
tu sai » tu bai, tu cai, tu lai

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 sai) OR (tu san)) ky tang xa hoi. hieu cao chat hoc va danh vi ((cau tren) OR (cau theo))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sai) OR (tu san)) ky tang xa hoi. hieu cao chat hoc va danh vi ((cau tren) or (cau theo))~".
• Adding a wildcard symbol may retrieve word variants: ((tu sai) OR (tu san)) ky tang xa hoi. hieu cao chat hoc va danh vi ((cau tren) or (cau theo))*.