Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
long gia » luong gia, long giao, ong gia
cua tre » cua te, cuu tre, cua triet
van hai » van ha, van chat, van hanh
lang xa » lang ha, dang xay, lang van
can ky » van ky, ban ky, tan ky
va hai » va chai, va khai, va bai
dan ky » van ky
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: tu ((can ky) or (dan ky)) lang xa hoi. hieu ((va hai) OR (van hai)) long gia thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((can ky) OR (dan ky)) lang xa hoi. hieu ((va hai) OR (van hai)) long gia thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((can ky) or (dan ky)) lang xa hoi. hieu ((va hai) OR (van hai)) long gia thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((can ky) or (dan ky)) lang xa hoi. hieu ((va hai) OR (van hai)) long gia thanh vi cua tre*.