Perhaps you should try some spelling variations:
thuoc sach » hoc sach, thuat sach, thuoc sinh
canh dinh » canh tinh, anh dinh, canh binh
nuoc sach » nguoi sach, hoc sach, cuoc cach
tu canh » thu canh, tu chanh, tu can
dinh ly » sinh ly, dinh le, trinh ly
hanh ky » hanh kem
ly khi » ly chi
ky khi » ky thi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu canh dinh ly khi đong luc ) or ( ((thuoc sach) or (nuoc sach)) hanh ky khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu canh dinh ly khi đong luc ) OR ( ((thuoc sach) OR (nuoc sach)) hanh ky khi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( tu canh dinh ly khi đong luc ) or ( ((thuoc sach) or (nuoc sach)) hanh ky khi đong luc ))*.