Perhaps you should try some spelling variations:
sach tranh » canh tranh
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
tranh ky » trinh ky, thanh ky, hanh ky
hoa khi » hoa hi, hoa thi, hoc khi
hoa phi » hoa phan, hoa thai
ky khi » ky thi, ly khi

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 tranh ((hoa khi) OR (hoa phi)) đong luc ) or ( thuoc sach tranh ky khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu sach tranh ((hoa khi) OR (hoa phi)) đong luc ) OR ( thuoc sach tranh ky khi đong luc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( thu sach tranh ((hoa khi) OR (hoa phi)) đong luc ) or ( thuoc sach tranh ky khi đong luc ))".
• Adding a wildcard symbol may retrieve word variants: (( thu sach tranh ((hoa khi) OR (hoa phi)) đong luc ) or ( thuoc sach tranh ky khi đong luc ))*.