Perhaps you should try some spelling variations:
gian muong » giang duong, gian trong
sach tinh » sac tinh, sach tranh, trach tinh
tinh hoc » sinh hoc, tin hoc, hinh hoc
hoc gian » hoc giao, hoc giai, hoc gia
te sach » toc sach
co giao » cho giao, so giao, mo giao
bo giao » so giao, hoc giao, hoa giao
tu sach » thu sach, su 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: (( te sach kinh ((co giao) OR (bo giao)) cong ) or ( tu sach tinh hoc gian muong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach kinh ((co giao) OR (bo giao)) cong ) OR ( tu sach tinh hoc gian muong )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( te sach kinh ((co giao) OR (bo giao)) cong ) or ( tu sach tinh hoc gian muong ))".
• Adding a wildcard symbol may retrieve word variants: (( te sach kinh ((co giao) OR (bo giao)) cong ) or ( tu sach tinh hoc gian muong ))*.