Perhaps you should try some spelling variations:
cach thien » cach thiet, sach thieu, cai thien
nghien cua » nghien cuu, nghiep cua, nghiep vua
nhanh khoa » nhan khoa, nganh khoa, hang khoa
canh thin » danh thin, manh thinh, can thi
coc nhanh » hoc nhanh, doc nhanh, cach nhanh
cong coc » cong cuoc, cong cac, cong co
khoa hoc » hoa hoc
van tuan » van quan, van ban, anh tuan
hoi van » hoi va, hoi dan, hai van
tuan va » toan va, luan va, quan va
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 ((canh thin) OR (cach thien)) tap, nghien cua cong coc nhanh khoa hoc xa hoi van tuan va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((canh thin) OR (cach thien)) tap, nghien cua cong coc nhanh khoa hoc xa hoi van tuan va".
• Adding a wildcard symbol may retrieve word variants: thu ((canh thin) OR (cach thien)) tap, nghien cua cong coc nhanh khoa hoc xa hoi van tuan va*.