Perhaps you should try some spelling variations:
su sach » so sach, vu sach
hieu su » hieu sau, tieu su, hieu so
su cham » su pham, tu cham, vu cham
te sach » toc sach
su hien » su kien, su tien, thu hien
xuc va » duc va, tuc va, luc va
loc va » hoc va, luc va
x hoi » xa hoi, o hoi, x ho
vi su » va su, ve su, ki su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (te sach)) ky nang x hoi. hieu su cham ((xuc va) or (loc va)) hanh vi su hien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (te sach)) ky nang x hoi. hieu su cham ((xuc va) OR (loc va)) hanh vi su hien.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (te sach)) ky nang x hoi. hieu su cham ((xuc va) or (loc va)) hanh vi su hien*.