Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
duc manh » suc manh, duc anh, duc minh
tai cua » thai cua, tai cuc, tri cua
duc van » duc va, duc tan, duc phan
hieu ve » hieu va, hieu van
sach ty » sach tu, sach thu, xach tay
nang ro » nang co, nang ho, nang ra
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
ro hoi » co hoi, o hoi, mo 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 (sach y)) nang ro hoi. hieu ve cac ((duc van) OR (duc manh)) hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach y)) nang ro hoi. hieu ve cac ((duc van) OR (duc manh)) hanh tai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (sach y)) nang ro hoi. hieu ve cac ((duc van) OR (duc manh)) hanh tai cua tre*".