Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
nhanh khoa » nhan khoa, nganh khoa, hang khoa
hoach hoi » hoc hoi, hoach ha, sach hoi
hoc nhanh » hoc nganh, hoc phan
thanh van » thanh san, thanh toan, thanh phan
tu hoach » thu hoach, tu hach, quy hoach
khoa hoc » hoa hoc
hoi tap » hoi dap, hoc tap, hoi tai
mot hoc » mon hoc, mo hoc, mot goc
ma hoi » mai hoi, xa hoi, ma hoa

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 mot hoc nhanh khoa hoc ma hoi va ((thanh van) or (pham van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu hoach hoi tap, nghien cua mot hoc nhanh khoa hoc ma hoi va ((thanh van) OR (pham van)).
• Adding a wildcard symbol may retrieve word variants: tu hoach hoi tap, nghien cua mot hoc nhanh khoa hoc ma hoi va ((thanh van) or (pham van))*.