Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
hieu ve » hieu va, hieu van
hanh ve » hanh vi, hanh va
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho
ve am » va am
thuc » thu

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 ly nang x hoi. hieu ve am thuc vat ((hanh de) or (((hanh ve) OR (hanh kem)))) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang x hoi. hieu ve am thuc vat ((hanh de) OR (((hanh ve) OR (hanh kem)))) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly nang x hoi. hieu ve am thuc vat ((hanh de) or (((hanh ve) OR (hanh kem)))) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ly nang x hoi. hieu ve am thuc vat ((hanh de) or (((hanh ve) OR (hanh kem)))) cua tre*.