Perhaps you should try some spelling variations:
hanh nhan » thanh nhan, danh nhan, anh nhan
hanh than » hanh han, hanh phan, nhanh thanh
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
tu sang » thu sang, tu san, tu lang
xuc va » duc va, tuc va, luc va
ma hoi » mai hoi, ma hoa, me hoi
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: tu sach tu sang ((ma hoi) or (xa hoi)). hieu ve cac xuc va ((hanh than) OR (hanh nhan)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu sang ((ma hoi) OR (xa hoi)). hieu ve cac xuc va ((hanh than) OR (hanh nhan)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu sang ((ma hoi) or (xa hoi)). hieu ve cac xuc va ((hanh than) OR (hanh nhan)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach tu sang ((ma hoi) or (xa hoi)). hieu ve cac xuc va ((hanh than) OR (hanh nhan)) cua tre*.