Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
xach tay » canh tay
van hanh » van thanh, ban hanh, van anh
tai cua » thai cua, tai cuc, tri cua
duc van » duc va, duc tan, duc manh
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
sach ty » sach tu, sach thu, sach hay
nang ho » nang hoc, nang co, tang ho
ve cac » va cac, vien cac
ho hoi » hoc hoi, hoa hoi, hoi hoi

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