Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
ly hang » ly quang
ty hang » ty xang, thi hang, thu hang
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua

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 ((ty hang) OR (ly hang)) xa hoi. hieu va chat ((xuc va) or (tuc va)) thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty hang) OR (ly hang)) xa hoi. hieu va chat ((xuc va) OR (tuc va)) thanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty hang) OR (ly hang)) xa hoi. hieu va chat ((xuc va) or (tuc va)) thanh vi cua tre*".