Perhaps you should try some spelling variations:
thien van » thi van
pham thuc » phap thuc, pham chuc, nham thuc
cua triet » cua viet, su triet, va triet
van pham » san pham, van phan, van phat
dinh dai » dinh dat, sinh dai, dinh dao
sach ky » sac ky, sach ty, sach kem
lang xa » lang ha, dang xay, lang van
thuc va » thuc vat, thuc dan, thuc day
va dinh » van dinh, va kinh, va tinh
cua tre » cua te, cuu tre, dua tren

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