Perhaps you should try some spelling variations:
thieu nien » thien nhien
may trinh » may tinh, lap trinh, quy trinh
trinh den » trinh dien, trinh dan, trinh dung
nien cac » vien cac, dien cac, bien cac
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
den cuu » dinh cuu, dien cuc, dien cua
cuu tre » cua tre, cau tren, cau treo
cac tu » cac thu, cach tu, cac du
tu may » tu ma, ty may, tu cay

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. thieu nien cac tu may trinh den cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang xa) OR (lang xa)) hoi. thieu nien cac tu may trinh den cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang xa) or (lang xa)) hoi. thieu nien cac tu may trinh den cuu tre*.