Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
chuc nganh » chuc nang, cac nganh, chuc danh
thanh phan » thanh pho, thanh san, thanh toan
hoc nganh » hoc nhanh
thong hoa » thong khoa, thong ha, thong hoc
dan thanh » dang thanh, danh thanh, ban thanh
mach hoc » cach hoc, dich hoc, anh hoc
ke mach » ke hoach
hoi dan » hoa dan, hoc dan, hoi dap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ke mach hoc tap, nghien thu cong ((hoc nganh) or (chuc nganh)) thong hoa xa hoi dan thanh phan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ke mach hoc tap, nghien thu cong ((hoc nganh) OR (chuc nganh)) thong hoa xa hoi dan thanh phan.
• Adding a wildcard symbol may retrieve word variants: ke mach hoc tap, nghien thu cong ((hoc nganh) or (chuc nganh)) thong hoa xa hoi dan thanh phan*.