Perhaps you should try some spelling variations:
cach thoi » cac thoi, cach thuc, cach noi
hoc nganh » hoc nhanh
nganh hoa » thanh hoa, khanh hoa, danh hoa
sach hoi » sach doi, sach moi, hoach hoi
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
van phan » van phong, van thanh, luan phan
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 ((sach hoi) OR (cach thoi)) tai, nghien cuu cong hoc nganh hoa hoc xa hoi van phan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach hoi) OR (cach thoi)) tai, nghien cuu cong hoc nganh hoa hoc xa hoi van phan dau".
• Adding a wildcard symbol may retrieve word variants: thu ((sach hoi) OR (cach thoi)) tai, nghien cuu cong hoc nganh hoa hoc xa hoi van phan dau*.