Perhaps you should try some spelling variations:
thuat mach » thuat sach, thuat tach, thuyet mach
van phong » van dong, hai phong
phong van » phung van, thong van, phong va
mach hoc » cach hoc, dich hoc, anh hoc
cuu cong » cua cong, thu cong, cac cong
cua nhan » ca nhan, cua ngan, cua nha
nong hoc » dong hoc, nang hoc, nong thon
hoi van » hoi va, hoi dan, hai van
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat mach hoc tap, nghien cuu cong ((cua nhan) or (cua ban)) nong hoc xa hoi van phong van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat mach hoc tap, nghien cuu cong ((cua nhan) OR (cua ban)) nong hoc xa hoi van phong van.
• Adding a wildcard symbol may retrieve word variants: thuat mach hoc tap, nghien cuu cong ((cua nhan) or (cua ban)) nong hoc xa hoi van phong van*.