Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu cao » chieu cao, hieu cac, hieu ca
chat soc » cham soc, chat hoc, chat doc
lang xa » lang ha, dang xay, lang van
sach ky » sac ky, sach y, sach ty
va dinh » van dinh, va kinh, vu dinh
va tinh » may tinh
dau cua » dai cua, day cua, cau cua
tu sach » thu sach, su sach, te sach

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky ((lang xa) or (nang x)) hoi. hieu cao chat soc ((va dinh) OR (va tinh)) dau cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((lang xa) OR (nang x)) hoi. hieu cao chat soc ((va dinh) OR (va tinh)) dau cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((lang xa) or (nang x)) hoi. hieu cao chat soc ((va dinh) OR (va tinh)) dau cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((lang xa) or (nang x)) hoi. hieu cao chat soc ((va dinh) OR (va tinh)) dau cua triet*.