Perhaps you should try some spelling variations:
sach trinh » sach tranh, hanh trinh, sach kinh
thuat sach » thuat lanh
thuat san » thuat toan, thuat song, thuat lanh
toan giao » toan cao, hoa giao
thu sach » tu sach, thuoc sach, thu hoach
trinh do » trinh ky
ton giao » hoc giao, so giao, don gian

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 trinh do - ton giao ) or ( ((thuat sach) OR (thuat san)) dinh so - toan giao ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu sach trinh do - ton giao ) OR ( ((thuat sach) OR (thuat san)) dinh so - toan giao ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( thu sach trinh do - ton giao ) or ( ((thuat sach) OR (thuat san)) dinh so - toan giao ))*".