Perhaps you should try some spelling variations:
sach tranh » canh tranh
tranh my » trinh my, tran sy, anh my
hoc sach » hoc sinh, hoc cac, hoc anh
tu sach » thu sach, su sach, tu cach
te sach » toc sach
tham ly » tam ly, tham my, thai ly
my khi » ky khi, my chi
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: (( tu sach tranh my khi đong luc ) or ( ((te sach) or (hoc sach)) tham ly khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tranh my khi đong luc ) OR ( ((te sach) OR (hoc sach)) tham ly khi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tranh my khi đong luc ) or ( ((te sach) or (hoc sach)) tham ly khi đong luc ))*.