Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
thien van » thi van
kinh dat » dinh dat, kinh dao, chinh dat
sach kem » hanh kem
van pham » san pham, van phan, van phat
nang xa » nang x, lang xa, nang ma
thuc va » thuc vat, thuc dan, thuc day
va kinh » va tinh, qua kinh
cua tre » cuu tre, cua triet, dua tren
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach kem) or (sach y)) nang xa hoi. thien van pham thuc va kinh dat ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach kem) OR (sach y)) nang xa hoi. thien van pham thuc va kinh dat ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach kem) or (sach y)) nang xa hoi. thien van pham thuc va kinh dat ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: toc ((sach kem) or (sach y)) nang xa hoi. thien van pham thuc va kinh dat ((cua tre) OR (cua te))*.