Perhaps you should try some spelling variations:
chau tre » chay tren, chau tho, cho tre
danh lai » danh sai, gianh lai, dinh lam
nam thuc » nam thuoc, am thuc, nam thu
cam thuc » am thuc, cam thu, can thuc
va danh » va dinh, va dan, va hanh
sach ky » sac ky, sach y, sach kem
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua

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) or (sach ty)) nang xa hoi. hieu va ((cam thuc) OR (nam thuc)) va danh lai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) nang xa hoi. hieu va ((cam thuc) OR (nam thuc)) va danh lai chau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach ty)) nang xa hoi. hieu va ((cam thuc) OR (nam thuc)) va danh lai chau tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach ty)) nang xa hoi. hieu va ((cam thuc) OR (nam thuc)) va danh lai chau tre*.