Perhaps you should try some spelling variations:
minh thao » minh thanh, sinh thai, minh giao
sach tien » sach tren, sach thieu
tien chao » dien cho, tien cua, tien giao
chao khoa » chai khoa, thao khoa, cao khoa
thu sach » thuat sach, thuoc sach, thu hoach
xin thao » dinh thao, lin thai, van thao
khoa hoc » hoa hoc
tu sach » su sach, te sach, tu cach

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 ( tu sach tien chao 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 ( tu sach tien chao 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 ( tu sach tien chao khoa hoc ))".
• Adding a wildcard symbol may retrieve word variants: (( thu sach ((xin thao) OR (minh thao)) khoa hoc ) or ( tu sach tien chao khoa hoc ))*.