Perhaps you should try some spelling variations:
nhan thuc » nhan luc, toan thuc
thien van » thi van
dan thuc » dan toc, am thuc
sach ty » sach y, sach tu, sach thu
ma hanh » va hanh, da hanh, na hanh
te sach » toc sach
hieu va » lieu va, hieu qua
nang co » nang cao, nang doc, nang noi
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
co hoi » co hoc, co loi
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 sach ty nang co hoi. ((hieu va) or (thien van)) ((nhan thuc) or (dan thuc)) ma hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang co hoi. ((hieu va) OR (thien van)) ((nhan thuc) OR (dan thuc)) ma hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang co hoi. ((hieu va) or (thien van)) ((nhan thuc) or (dan thuc)) ma hanh vi cua tre*.