Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
sang ma » tang ma, nang ma, sang tao
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
soc gia » toc gia, hoc gia, so gia
hanh va » hanh vi
tu sach » thu sach, su sach, te sach

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 cham soc gia ((hanh va) OR (hang va)) su 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 cham soc gia ((hanh va) OR (hang va)) su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang xa) or (sang ma)) hoi. hieu ve cham soc gia ((hanh va) OR (hang va)) su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) or (sang ma)) hoi. hieu ve cham soc gia ((hanh va) OR (hang va)) su triet*.