Perhaps you should try some spelling variations:
minh thao » minh thanh, sinh thai, minh giao
chan khoa » nhan khoa, chai khoa, chat khoa
thu sach » tu sach, thuat sach, thuoc sach
xin thao » dinh thao, lin thai, van thao
khoa hoc » hoa hoc
sach can » sach cap, sach han, sach san
can chan » dan chan, cam chan, ban chan

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu sach ((xin thao) OR (minh thao)) khoa hoc ) or ( thu sach can chan khoa hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu sach ((xin thao) OR (minh thao)) khoa hoc ) OR ( thu sach can chan khoa hoc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( thu sach ((xin thao) OR (minh thao)) khoa hoc ) or ( thu sach can chan khoa hoc ))".
• Adding a wildcard symbol may retrieve word variants: (( thu sach ((xin thao) OR (minh thao)) khoa hoc ) or ( thu sach can chan khoa hoc ))*.