Perhaps you should try some spelling variations:
hang khoa » dung khoa
cac thoi » cac toi, cac hop, cac tro
thoi tap » toi tap, hoc tap, thoi dai
cuu cong » cua cong, thu cong, cac cong
cong coc » cong cuoc, cong cac, cong co
coc hang » hoc hang, oc hang, moc hoang
khoa hoc » hoa hoc
nha lanh » nha kinh
nhan tao » nhan tai, nhan dan
hoc mat » hoc ma, hoc may, hoc mac
te cac » tu cac, ve cac, te cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cac thoi tap, nghien cuu cong coc hang khoa hoc mat ((nha lanh) OR (nha lam)) nhan tao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac thoi tap, nghien cuu cong coc hang khoa hoc mat ((nha lanh) OR (nha lam)) nhan tao".
• Adding a wildcard symbol may retrieve word variants: te cac thoi tap, nghien cuu cong coc hang khoa hoc mat ((nha lanh) OR (nha lam)) nhan tao*.