Perhaps you should try some spelling variations:
van triet » va triet, van thiet, van trieu
day nhanh » day thanh, duy nhanh, dac nhan
nhanh do » nhanh doc, thanh do, nhanh dong
thuc day » thuc dan, thuc vat
vien cac » vien bach, vien dai, vien da
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
ve cham » va cham, ve chat, vu cham
do van » dao van, vo van, so van
x hoi » xa hoi, o hoi, x ho

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) OR (sach ty)) nang x hoi. hieu ((ve cham) or (vien cac)) thuc day nhanh do van triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) nang x hoi. hieu ((ve cham) OR (vien cac)) thuc day nhanh do van triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach ty)) nang x hoi. hieu ((ve cham) or (vien cac)) thuc day nhanh do van triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sach ty)) nang x hoi. hieu ((ve cham) or (vien cac)) thuc day nhanh do van triet*.