Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
danh gia » dan gian
hieu ve » hieu va, hieu van
sach ky » sach ty, sach kem, sach hay
cac dac » cac dan, cac dai, cac bac
va danh » va dinh, va dan, va hanh
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
dac va » duc va, day va, dat va
gia su » gia suc, giao su, gia sa
x hoi » xa hoi, o hoi, x ho

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 ky) or (sac ky))) or (sach y)) nang x hoi. hieu ve cac dac va danh gia su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach ky) OR (sac ky))) OR (sach y)) nang x hoi. hieu ve cac dac va danh gia su triet.
• Adding a wildcard symbol may retrieve word variants: tu ((((sach ky) or (sac ky))) or (sach y)) nang x hoi. hieu ve cac dac va danh gia su triet*.