Perhaps you should try some spelling variations:
thuc dan » hoc dan, thuc vat
hanh va » hang va
sach tu » sach thu, cach tu, sach ty
te sach » toc sach
hieu va » lieu va, hieu qua
tu nang » tru nang, tu nong, tu nano
cua tre » cua te, cuu tre, cua triet
va can » va chan, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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

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