Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
cua tre » cua te, cuu tre, cua triet
hanh va » hang va, hanh vi
xa hanh » xa thanh, xa khanh, va hanh
nam tuc » nam thuc, nam truc, nam tu
sach ky » sac ky, sach y, sach kem
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ky) OR (sach ty)) nang xa hoi. hieu va nam tuc xa hanh va ((cua tre) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) nang xa hoi. hieu va nam tuc xa hanh va ((cua tre) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach ty)) nang xa hoi. hieu va nam tuc xa hanh va ((cua tre) or (va triet))*".