Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
hoach hoi » hoc hoi, hoach ha, sach hoi
dang khoa » hang khoa, dang khoi, dong khoa
dung khoa » dung cho
tu hoach » thu hoach, tu hach, quy hoach
cua toan » cuu toan, xuan toan, cua thanh
cua nhan » ca nhan, cua ngan, cua nha
hoi tap » hoi dap, hoc tap, hoi tai
hoi cua » hoi chuc
nhan va » nhan tai, nhan dan, nhan tao
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: tu hoach hoi tap, nghien cua toan khoa ((dang khoa) or (dung khoa)) hoc xa hoi cua nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu hoach hoi tap, nghien cua toan khoa ((dang khoa) OR (dung khoa)) hoc xa hoi cua nhan va.
• Adding a wildcard symbol may retrieve word variants: tu hoach hoi tap, nghien cua toan khoa ((dang khoa) or (dung khoa)) hoc xa hoi cua nhan va*.