Perhaps you should try some spelling variations:
thanh thanh » nhanh thanh, thanh toan, thanh phan
thanh cua » tranh cua, than cua, hanh cua
hieu van » hieu va, thien van, hieu ve
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
ly nang » ky nang, ly hang, ly quang
ly vang » ly hang, ly van, ly quang
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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 ((ly nang) OR (ly vang)) xa hoi. ((hieu van) or (lieu va)) bac xuc va thanh thanh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ly nang) OR (ly vang)) xa hoi. ((hieu van) OR (lieu va)) bac xuc va thanh thanh cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ly nang) OR (ly vang)) xa hoi. ((hieu van) or (lieu va)) bac xuc va thanh thanh cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((ly nang) OR (ly vang)) xa hoi. ((hieu van) or (lieu va)) bac xuc va thanh thanh cua tre*.