Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
kham tuc » nham thuc, pham thuc, kham cuoc
toc sach » hoc sach, doc sach, thuoc sach
tang ma » tang van
hieu vu » hieu va, hieu ve, hieu su
sach ky » sac ky, sach y, sach ty
cau cua » cau qua, ca cua, cu cua
vu kham » vu khanh
va dat » va dau, va dap, va dai
va dao » ca dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky ((mang may) or (tang ma)) hoi. hieu vu kham tuc ((va dat) or (va dao)) cau cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky ((mang may) OR (tang ma)) hoi. hieu vu kham tuc ((va dat) OR (va dao)) cau cua triet.
• Adding a wildcard symbol may retrieve word variants: toc sach ky ((mang may) or (tang ma)) hoi. hieu vu kham tuc ((va dat) or (va dao)) cau cua triet*.