Perhaps you should try some spelling variations:
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
sach ty » sach y, sach tu, sach thu
te sach » toc sach
hang co » hang cho, hang ca, nang co
ty hang » ly hang, ty xang, thi hang
cua tre » cua te, cuu tre, cua triet
co hoi » co hoc, co loi
bo van » vo van, do van, ho van
so van » su van, vo van
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: te sach ty hang co hoi. ((hieu van) or (thien van)) cac ((bo van) or (so van)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty hang co hoi. ((hieu van) OR (thien van)) cac ((bo van) OR (so van)) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ty hang co hoi. ((hieu van) or (thien van)) cac ((bo van) or (so van)) hanh vi cua tre*.