Perhaps you should try some spelling variations:
ve triet » va trien, su triet
sach tru » sach truc, sach thu, sach tu
cham duc » pham duc, cham soc, pham duy
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
tu cham » toc cham, thi cham
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
hieu tu » chieu tu, hieu tuc, hien tu

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 tru ((nang xa) OR (nang ma)) hoi. hieu tu cham duc ((va hanh) or (va danh)) de ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tru ((nang xa) OR (nang ma)) hoi. hieu tu cham duc ((va hanh) OR (va danh)) de ve triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tru ((nang xa) OR (nang ma)) hoi. hieu tu cham duc ((va hanh) or (va danh)) de ve triet*".