Perhaps you should try some spelling variations:
xanh hanh » danh thanh, ban hanh, van hanh
hanh dai » hanh tai, hanh dao, vanh dai
duc xanh » duc anh, duc manh, duc hanh
sach ty » sach tu, sach thu, xach tay
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
va cam » va cham, va cac, va cao
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ty) or (sach y)) nang xa hoi. hieu ((ve cac) or (va cam)) duc xanh hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach y)) nang xa hoi. hieu ((ve cac) OR (va cam)) duc xanh hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) or (sach y)) nang xa hoi. hieu ((ve cac) or (va cam)) duc xanh hanh dai cua tre*.