Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
dinh vai » dinh van, dinh vi, dinh va
va dinh » van dinh, va kinh, va tinh
sach ty » sach y, sach tu, sach thu
so sach » so sanh, bo sach, co sach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
xuc va » duc va, tuc va, luc va
vai su » va su, van su, lai su

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty ((nang xa) OR (lang xa)) hoi. ((hieu ve) or (hieu qua)) cam xuc va dinh vai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((nang xa) OR (lang xa)) hoi. ((hieu ve) OR (hieu qua)) cam xuc va dinh vai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty ((nang xa) OR (lang xa)) hoi. ((hieu ve) or (hieu qua)) cam xuc va dinh vai su triet".
• Adding a wildcard symbol may retrieve word variants: so sach ty ((nang xa) OR (lang xa)) hoi. ((hieu ve) or (hieu qua)) cam xuc va dinh vai su triet*.