Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
cach thoi » cac thoi, cach thuc, cach noi
thu cach » thuc cach, thu canh, tu cach
thoi tap » toi tap, hoc tap, thoi dai
cong hoc » dong hoc, cong hoa, cong coc
hoc danh » hoc dan, hoc anh, hoc hanh
danh hoa » thanh hoa, khanh hoa, nganh hoa
nhan dan » gian dan, nhan tai
phan dau » phan tu, hang dau
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: thu cach thoi tap, nghien thu cong hoc danh hoa hoc xa hoi van ((nhan dan) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu cach thoi tap, nghien thu cong hoc danh hoa hoc xa hoi van ((nhan dan) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: thu cach thoi tap, nghien thu cong hoc danh hoa hoc xa hoi van ((nhan dan) or (phan dau))*.