Perhaps you should try some spelling variations:
thanh loi » thanh hoa, thanh hai, thanh lap
toc sach » hoc sach, doc sach, thuoc sach
nam thuc » nam thuoc, am thuc, nam thu
hanh doi » thanh doi, hanh noi, hang doi
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y nang ma hoi. ((hieu ve) or (lieu va)) nam thuc vat ((hanh doi) or (thanh loi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang ma hoi. ((hieu ve) OR (lieu va)) nam thuc vat ((hanh doi) OR (thanh loi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach y nang ma hoi. ((hieu ve) or (lieu va)) nam thuc vat ((hanh doi) or (thanh loi)) cua tre*.