Perhaps you should try some spelling variations:
hanh noi » ha noi, hanh vi, nang noi
hanh doi » thanh doi, hang doi, hanh moi
hieu van » hieu va, thien van, lieu va
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
van cam » van nam, van lam, van cau
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
so van » su van, vo van
cam so » nam so, ham so, cam lo

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 ky ((nang xa) or (lang xa)) hoi. hieu van cam so van ((hanh doi) or (hanh noi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang xa) OR (lang xa)) hoi. hieu van cam so van ((hanh doi) OR (hanh noi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang xa) or (lang xa)) hoi. hieu van cam so van ((hanh doi) or (hanh noi)) cua tre*.