Perhaps you should try some spelling variations:
ve triet » va trien, su triet
tinh gi » tinh gia, sinh gi, tinh vi
va tinh » may tinh
cao duc » dao duc, cao suc, giao duc
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
sang ma » tang ma, nang ma, sang tao
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
gi ve » gia ve, gi de, gi he

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 ty ((nang xa) or (sang ma)) hoi. hieu ve ((cao duc) or (pham duc)) va tinh gi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (sang ma)) hoi. hieu ve ((cao duc) OR (pham duc)) va tinh gi ve triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) or (sang ma)) hoi. hieu ve ((cao duc) or (pham duc)) va tinh gi ve triet*.