Perhaps you should try some spelling variations:
hanh noi » ha noi, nang noi
sach thu » sach thue, sach thieu, sach tham
xuc van » duc van, luc van, vuc van
dau xuc » dau xac, dau xua, dau nuoc
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, xach tay
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
va dau » va dao

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 thu)) nang ma hoi. lieu va dau xuc van ((hanh noi) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach thu)) nang ma hoi. lieu va dau xuc van ((hanh noi) OR (hanh vi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) or (sach thu)) nang ma hoi. lieu va dau xuc van ((hanh noi) or (hanh vi)) cua tre*.