Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
doc sach » hoc sach, toc sach, dac sac
danh gia » dan gian
hieu van » hieu va, thien van, lieu va
va danh » va dinh, va dan, va hanh
cac xuc » cam xuc, cac nuoc, chat xuc
van cac » van hac, van cau, van bac
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
su tien » su kien, su hien, tu tieng
xuc va » duc va, tuc va, luc va
gia su » gia suc, giao su, gia sa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc sach) or (nuoc sach)) ((ty nang) OR (ty hang)) xa hoi. hieu van cac xuc va danh gia su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc sach) OR (nuoc sach)) ((ty nang) OR (ty hang)) xa hoi. hieu van cac xuc va danh gia su tien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc sach) or (nuoc sach)) ((ty nang) OR (ty hang)) xa hoi. hieu van cac xuc va danh gia su tien".
• Adding a wildcard symbol may retrieve word variants: ((doc sach) or (nuoc sach)) ((ty nang) OR (ty hang)) xa hoi. hieu van cac xuc va danh gia su tien*.