Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
ban hanh » ban hang
te sach » toc sach
duc ban » duc tan, duc van, dua ban
cua tre » cua te, cuu tre, cua triet
dan tay » ban tay, dao tay, gian tay
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai

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 ((dung tai) or (dan tay)) hoi. hieu ((ve cam) OR (ve cac)) duc ban hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((dung tai) OR (dan tay)) hoi. hieu ((ve cam) OR (ve cac)) duc ban hanh dai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((dung tai) or (dan tay)) hoi. hieu ((ve cam) OR (ve cac)) duc ban hanh dai cua tre*".