Perhaps you should try some spelling variations:
xanh cay » xanh ca, nhanh cay, xanh a
cay phoi » cap phoi, tay hoi, cay cho
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky xanh » ky anh, ky danh, ky hanh
cac duc » cao duc, cac nuoc, cac cuoc
cac dac » cac dan, cac dai, cac bac
ban anh » ban hanh, ban banh, ban danh
anh hai » lanh hai, manh hai, anh thai
hai cua » thai cua, dai cua, hoi cua

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 ky xanh cay phoi. lieu va ((((cac duc) or (cac du))) or (cac dac)) ban anh hai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky xanh cay phoi. lieu va ((((cac duc) OR (cac du))) OR (cac dac)) ban anh hai cua viet.
• Adding a wildcard symbol may retrieve word variants: su sach ky xanh cay phoi. lieu va ((((cac duc) or (cac du))) or (cac dac)) ban anh hai cua viet*.