Perhaps you should try some spelling variations:
sach ngan » sach ngon, sach nha, sach han
sach ngoc » sach ngon, sach nuoc, bich ngoc
toc sach » hoc sach, doc sach, thuoc sach
su sach » so sach, vu sach
ngoc ly » ngoc lan
my khi » my chi
ky khi » ky thi
ly khi » ly chi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach ngan ((my khi) OR (ky khi)) đong luc ) or ( toc sach ngoc ly khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach ngan ((my khi) OR (ky khi)) đong luc ) OR ( toc sach ngoc ly khi đong luc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( su sach ngan ((my khi) OR (ky khi)) đong luc ) or ( toc sach ngoc ly khi đong luc ))".
• Adding a wildcard symbol may retrieve word variants: (( su sach ngan ((my khi) OR (ky khi)) đong luc ) or ( toc sach ngoc ly khi đong luc ))*.