Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
thi pham » thi phap, toi pham, thi cham
chat tre » chay tren, chat tai, choi tre
hanh lam » thanh lap, hanh kem, hanh va
nang xa » nang x, lang xa, nang ma
sach ky » sac ky, sach ty, sach kem
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
cho tre » cho thue, khoe tre

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((sach ky) OR (sach y)) nang xa hoi. su thi pham thuc va hanh lam ((chat tre) OR (cho tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((sach ky) or (sach y)) nang xa hoi. su thi pham thuc va hanh lam ((chat tre) OR (cho tre))~".
• Adding a wildcard symbol may retrieve word variants: doc ((sach ky) or (sach y)) nang xa hoi. su thi pham thuc va hanh lam ((chat tre) OR (cho tre))*.