Perhaps you should try some spelling variations:
thuat thuc » thuat thuy, thuyet thuc, thuc thuc
dang xay » dang van, van xay
va thuat » ky thuat, ki thuat, va thuc
thuc van » thuc vat, thuc dan, thuc va
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
van anh » van thanh, tuan anh, van minh
anh dai » vanh dai, anh bai, anh dat
cua tre » cua te, cuu tre, cua triet

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 xa) or (dang xay)) hoi. hieu va thuat thuc van anh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (dang xay)) hoi. hieu va thuat thuc van anh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang xa) or (dang xay)) hoi. hieu va thuat thuc van anh dai cua tre*.