Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
cham hoc » cham soc, chat hoc, cham hoi
cuu tre » cua tre, cau tren
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
lang ha » long ha
lang xa » dang xay, lang van
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) OR (lang ha)) hoi. hieu ve cham hoc va danh vi ((cuu tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((lang xa) OR (lang ha)) hoi. hieu ve cham hoc va danh vi ((cuu tre) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((lang xa) OR (lang ha)) hoi. hieu ve cham hoc va danh vi ((cuu tre) or (cau treo))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((lang xa) OR (lang ha)) hoi. hieu ve cham hoc va danh vi ((cuu tre) or (cau treo))*.