Perhaps you should try some spelling variations:
hoi lang » hoa lang, hoi dan
hieu van » hieu va, thien van, lieu va
cham cuu » cap cuu
chat cua » nhat cua, chat va, chat huu
ban hanh » ban hang
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
y lang » o lang, _ lang, tay lang
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 ((y lang) or (hoi lang)) xa hoi. hieu van ((cham cuu) OR (chat cua)) ban hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y lang) OR (hoi lang)) xa hoi. hieu van ((cham cuu) OR (chat cua)) ban hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y lang) or (hoi lang)) xa hoi. hieu van ((cham cuu) OR (chat cua)) ban hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((y lang) or (hoi lang)) xa hoi. hieu van ((cham cuu) OR (chat cua)) ban hanh vi cua tre*.