Perhaps you should try some spelling variations:
cach thoi » cac thoi, cach thuc, cach noi
danh khoa » doanh khoa, anh khoa, danh hoa
thoi tap » toi tap, hoc tap, thoi dai
cac cong » cua cong
hoc danh » hoc dan, hoc anh, hoc hanh
khoa hoc » hoa hoc
cac luan » cac luat, sach luan, cac dan
tu cach » tu cac
cuu mon » cuu mo, cuu mot, cuu cong
voi cac » loi cach
hoc da » hoc dan, hoc dai, hoc dat
da voi » dao voi, dua voi, ba voi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach thoi tap, nghien ((cuu mon) or (cac cong)) hoc danh khoa hoc da voi cac luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach thoi tap, nghien ((cuu mon) OR (cac cong)) hoc danh khoa hoc da voi cac luan van.
• Adding a wildcard symbol may retrieve word variants: tu cach thoi tap, nghien ((cuu mon) or (cac cong)) hoc danh khoa hoc da voi cac luan van*.