Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
xac danh » xac dinh, tac danh, sach danh
hai cua » thai cua, dai cua, hoi cua
sai cua » dai cua, lai cua, bai cua
thu xac » thau xay
su sach » so sach, vu sach
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
hiem he » hiem xe, hieu he, thien he
he nam » ha nam, nghe nam
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (thu sach)) ky sang ma hoi. hiem he nam thu xac danh ((sai cua) or (hai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu sach)) ky sang ma hoi. hiem he nam thu xac danh ((sai cua) OR (hai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thu sach)) ky sang ma hoi. hiem he nam thu xac danh ((sai cua) or (hai cua)) triet*.