Perhaps you should try some spelling variations:
day nhanh » day thanh, duy nhanh, dac nhan
nhanh vai » nhanh va, nhanh vi, nhanh hai
lang hoa » hang hoa, lang ha, nang hoa
cua viet » cua vat, cua dieu, va viet
tu sach » thu sach, su sach, te sach
ca viet » va viet, co viet, san viet
thu day » thuc day, thu da, thu dac
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
hoa hoi » khoa hoi, hoa hoc, hoa doi
ky lang » ky nang, ky dang, ky tang
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky lang hoa hoi. hieu va nam thu day nhanh vai ((((cua viet) OR (ca viet))) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang hoa hoi. hieu va nam thu day nhanh vai ((((cua viet) OR (ca viet))) OR (hoa viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang hoa hoi. hieu va nam thu day nhanh vai ((((cua viet) OR (ca viet))) or (hoa viet))*".