Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cam thuc » am thuc, nam thuc, cam thu
danh doi » danh di, thanh doi, dung doi
cua tre » cua te, cuu tre, dua tren
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
sai ky » sac ky
ve cam » ve cham, ve cac, va cam

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