Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh tai, hanh van
tu sach » thu sach, su sach, te sach
dua ban » dia ban, cua ban, qua ban
hanh va » hang va, hanh vi
van hau » van ha, van hai, van dau
van cau » van dau, van chat, toan cau
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
y lang » o lang, _ lang, tay lang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y lang xa hoi. hieu ((van cau) OR (van hau)) dua ban ((hanh vai) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang xa hoi. hieu ((van cau) OR (van hau)) dua ban ((hanh vai) OR (hanh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang xa hoi. hieu ((van cau) OR (van hau)) dua ban ((hanh vai) or (hanh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. hieu ((van cau) OR (van hau)) dua ban ((hanh vai) or (hanh va)) cua tre*.