Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
sach kem » hanh kem
dau cua » dai cua, day cua, cau cua
dat dau » dat dai, bat dau, dat cau
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
thi van » thi lan, thi hanh, thi nang
nang xa » nang x, lang xa, nang ma
va dat » va dao, va dau, va dap

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