Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tham thuc » nham thuc, pham thuc, tam thuc
hanh hai » thanh hai, nhanh hai, hang hai
van hanh » van thanh, ban hanh, van anh
thuc van » thuc vat, thuc dan, thuc va
hieu va » hieu qua
nang ma » tang ma, sang ma, nang cao
sach ty » sach tu, sach thu, xach tay
hai cua » thai cua, dai cua, hoi cua
ma hoi » mai hoi, xa hoi, ma hoa

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 y) or (sach ty)) nang ma hoi. ((hieu va) or (lieu va)) tham thuc van hanh hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach y) OR (sach ty)) nang ma hoi. ((hieu va) OR (lieu va)) tham thuc van hanh hai cua triet.
• Adding a wildcard symbol may retrieve word variants: thu ((sach y) or (sach ty)) nang ma hoi. ((hieu va) or (lieu va)) tham thuc van hanh hai cua triet*.