Perhaps you should try some spelling variations:
nhanh chong » thanh cong, khanh phong
nganh cong » thanh cong
cach thoi » cac thoi, cach thuc, cach noi
thoi tap » toi tap, hoc tap, thoi dai
cuu toan » cuu hoan, cua toan, huu toan
toan hoc » toan khoa, van hoc, hoa hoc
thuoc xa » thuoc ma, thuoc va, thuoc la
tu cach » tu cac
va nhan » van nhan, ca nhan, va phan
nhan va » nhan tai, nhan dan, nhan tao

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 toan hoc ((nganh cong) OR (nhanh chong)) thuoc xa hoi va nhan va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cach thoi tap, nghien cuu toan hoc ((nganh cong) OR (nhanh chong)) thuoc xa hoi va nhan va".
• Adding a wildcard symbol may retrieve word variants: tu cach thoi tap, nghien cuu toan hoc ((nganh cong) OR (nhanh chong)) thuoc xa hoi va nhan va*.