Perhaps you should try some spelling variations:
thuc cach » thuoc sach, truoc cach, thuc hanh
cach thoi » cac thoi, cach thuc, cach noi
thoi dap » hoi dap, thoi dai, thi dap
san khoa » toan khoa, hang khoa, da khoa
khoa hoc » hoa hoc
phan dau » phan tu, hang dau
cuu mon » cuu mo, cuu mot, cuu cong
mon toc » mon hoc, mon toan, mong coc
hoi cau » hoi chu, hoc cau, hoa cau
hoi ca » hoi cua, hoi cac, hoi va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuc cach thoi dap, nghien cuu mon toc san khoa hoc ma ((hoi ca) or (hoi cau)) phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuc cach thoi dap, nghien cuu mon toc san khoa hoc ma ((hoi ca) OR (hoi cau)) phan dau.
• Adding a wildcard symbol may retrieve word variants: thuc cach thoi dap, nghien cuu mon toc san khoa hoc ma ((hoi ca) or (hoi cau)) phan dau*.