Perhaps you should try some spelling variations:
sach trien » sach tien, sach tren, sach thieu
toan kinh » than kinh, xuan kinh, toan tin
cac khien » cac chien, cac phien, cach thien
khien hoc » nhiet hoc, dien hoc
trien cac » thien cac, trien cam, trien cay
khoan hoc » khoa hoc, khoan hoi, khoan nhoi
kinh cac » dinh cac, kinh bac, kinh can
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 kinh cac khien hoc ) or ( vu sach trien cac khoan hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thuat toan kinh cac khien hoc ) OR ( vu sach trien cac khoan hoc )).
• Adding a wildcard symbol may retrieve word variants: (( thuat toan kinh cac khien hoc ) or ( vu sach trien cac khoan hoc ))*.