Perhaps you should try some spelling variations:
thanh dam » thanh dat, thanh nam, thanh tam
hieu van » hieu va, thien van, lieu va
van chat » cao chat
hanh dao » lanh dao, thanh dat, doanh dao
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
luc va » tuc va, loc va
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: su sach ky nang x hoi. hieu van chat ((luc va) or (duc va)) ((hanh dao) OR (thanh dam)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu van chat ((luc va) OR (duc va)) ((hanh dao) OR (thanh dam)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. hieu van chat ((luc va) or (duc va)) ((hanh dao) OR (thanh dam)) cua tre*".