Perhaps you should try some spelling variations:
hanh doi » thanh doi, hang doi, hanh moi
hanh noi » ha noi, hanh vi, nang noi
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ve hoc » te hoc, va hoc, vi hoc
nuoc » quoc, duoc, ngoc

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 y nang ma hoa. hieu ve hoc nuoc va ((hanh doi) or (hanh noi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoa. hieu ve hoc nuoc va ((hanh doi) OR (hanh noi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoa. hieu ve hoc nuoc va ((hanh doi) or (hanh noi)) cua tre*.