Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
cua triet » cua viet, su triet, va triet
thanh vai » thanh hai, thanh van, thanh tai
van thanh » ban thanh, van tuan
thuc van » thuc vat, thuc dan, thuc va
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
sach ky » sac ky, sach ty, sach kem
nang ma » tang ma, sang ma, nang cao
ca viet » va viet, co viet, hoa viet

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ky) OR (sach y)) nang ma hoa. hieu va tham thuc van thanh vai ((cua triet) or (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach y)) nang ma hoa. hieu va tham thuc van thanh vai ((cua triet) OR (ca viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) OR (sach y)) nang ma hoa. hieu va tham thuc van thanh vai ((cua triet) or (ca viet))".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) OR (sach y)) nang ma hoa. hieu va tham thuc van thanh vai ((cua triet) or (ca viet))*.