Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
kham tuc » nham thuc, pham thuc, kham cuoc
cau cua » cau qua, ca cua, cu cua
sach ky » sac ky, sach y, sach ty
hieu vu » hieu va, hieu ve, hieu su
te sach » toc sach
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
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: te sach ky ((nang ma) 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: te sach ky ((nang ma) OR (tang ma)) hoi. hieu vu kham tuc ((va dat) OR (va dao)) cau cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang ma) or (tang ma)) hoi. hieu vu kham tuc ((va dat) OR (va dao)) cau cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang ma) or (tang ma)) hoi. hieu vu kham tuc ((va dat) OR (va dao)) cau cua triet*.