Perhaps you should try some spelling variations:
sach ngon » sach ngan, danh ngon, canh ngon
ngon chet » nguoi chet, ngon viet, muon chet
chet khit » chat khi
vu khanh » vu thanh, van khanh, duy khanh
thu sach » tu sach, thuat sach, thuoc sach
su sach » so sach, vu sach
hanh ky » hanh kem

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((vu khanh) or (su sach)) hanh ky thi đong luc ) or ( thu sach ngon chet khit đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((vu khanh) OR (su sach)) hanh ky thi đong luc ) OR ( thu sach ngon chet khit đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( ((vu khanh) or (su sach)) hanh ky thi đong luc ) or ( thu sach ngon chet khit đong luc ))*.