Perhaps you should try some spelling variations:
thien cac » hien cac, thien cau, thieu cac
thien cao » thien bao, thien cau, thien van
chat hoc » chat hoa, chat thom, cho hoc
cau theo » cau thi, cau tao
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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 lang xa hoi. ((thien cao) OR (thien cac)) chat hoc va hanh vi ((cuu tre) or (cau theo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky lang xa hoi. ((thien cao) OR (thien cac)) chat hoc va hanh 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. ((thien cao) OR (thien cac)) chat hoc va hanh vi ((cuu tre) or (cau theo))*".