Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
cua tre » cua te, cuu tre, cua triet
tang xa » trang xa, tang ma, lang xa
duc ban » duc tan, duc van, dua ban
va cam » va cham, va cac, va cao
sac ky » sai ky
ve cam » ve cham, ve cac, ve cai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sac ky) OR (cac ky)) tang xa hoi. hieu ((ve cam) OR (va cam)) duc ban thanh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sac ky) OR (cac ky)) tang xa hoi. hieu ((ve cam) or (va cam)) duc ban thanh dai cua tre~".
• Adding a wildcard symbol may retrieve word variants: su ((sac ky) OR (cac ky)) tang xa hoi. hieu ((ve cam) or (va cam)) duc ban thanh dai cua tre*.