Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
sach tranh » canh tranh
nganh ly » nganh y, nganh xay, nganh co
nganh ky » nganh y, nganh xay, hanh ky
tu sach » thu sach, su sach, te sach
tranh y » trinh y, tranh o, tranh 30
y khi » ly khi, ky khi, my khi

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

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