Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
nang mai » nang ma, nang tai, lang mai
hang doi » hang di, hang loi, huong doi
hanh doi » thanh doi, hanh noi, hanh moi
thuc va » thuc vat, thuc dan, thuc day
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
hieu he » hieu ve, hiem he, hieu hien
hieu le » hieu ve, hieu ly, tieu le
mai hoi » mai khoi, dai hoi, lai hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang mai hoi. ((hieu le) or (hieu he)) va thuc va ((hanh doi) or (hang doi)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang mai hoi. ((hieu le) OR (hieu he)) va thuc va ((hanh doi) OR (hang doi)) cua viet.
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang mai hoi. ((hieu le) or (hieu he)) va thuc va ((hanh doi) or (hang doi)) cua viet*.