Perhaps you should try some spelling variations:
thuoc va » thuoc ma, thuong va, thuoc tai
te sach » toc sach
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
te sac » te cac, te san
ve nam » he nam, va nam, le nam
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) or (te sach)) ky nang x ho. hieu ve nam ((thuoc va) OR (thuc va)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ky nang x ho. hieu ve nam ((thuoc va) OR (thuc va)) hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) or (te sach)) ky nang x ho. hieu ve nam ((thuoc va) OR (thuc va)) hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (te sach)) ky nang x ho. hieu ve nam ((thuoc va) OR (thuc va)) hanh vi cua tre*.