Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nguong dan » huong dan
hien manh » hien hanh, tien manh, hieu manh
trinh vat » trinh van, trinh luat, sinh vat
vat lang » va lang, van lang, vat mang
nong san » cong san, dong san, nong dan
chan tu » phan tu, han tu, chon tu

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien manh - hanh trinh vat lang ((nguong dan) OR (nong san)) chan tu~.
• Adding a wildcard symbol may retrieve word variants: hoc hien manh - hanh trinh vat lang ((nguong dan) or (nong san)) chan tu*.