Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cac » van hac, van cau, van bac
sach ty » sach y, sach tu, sach thu
te sach » toc sach
ty hang » ly hang, ty xang, thi hang
cua tre » cua te, cuu tre, cua triet
mo hoc » mon hoc, co hoc
bo van » vo van, do van, ho van
so van » su van, vo van
vi cua » vai cua, di cua
o hoc » co hoc, so hoc, y hoc

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 ((o hoc) OR (mo hoc)). hieu van cac ((bo van) OR (so van)) hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty hang ((o hoc) OR (mo hoc)). hieu van cac ((bo van) OR (so van)) hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ty hang ((o hoc) OR (mo hoc)). hieu van cac ((bo van) OR (so van)) hanh vi cua tre*.