Perhaps you should try some spelling variations:
toan dinh » tran dinh, toan kinh, doan dinh
cac khien » cac chien, cac phien, cach thien
khien hoc » nhiet hoc, dien hoc
cach thoi » cac thoi, cach thuc, cach noi
dinh cac » tinh cach, dinh chuc, dinh chau
sach xin » sach kinh, sach tien, sach xa
xin cach » tinh cach, minh cach, dan cach
thoi hoc » hoi hoc, thai hoc, phoi hoc
vu sach » vu bach, su sach, vu khach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thuat toan dinh cac khien hoc ) or ( vu sach xin cach thoi hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thuat toan dinh cac khien hoc ) OR ( vu sach xin cach thoi hoc )).
• Adding a wildcard symbol may retrieve word variants: (( thuat toan dinh cac khien hoc ) or ( vu sach xin cach thoi hoc ))*.