Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
cam thuc » am thuc, nam thuc, cam thu
va thanh » gia thanh, ban thanh, va tinh
nang ma » tang ma, sang ma, nang cao
van cam » van nam, van lam, van cau
thuc va » thuc vat, thuc dan, thuc day
doi cua » dai cua, hoi cua
te cac » tu cac, ve cac, te cao
ke san » ke dan
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: ((te cac) or (ke san)) ky nang ma hoi. hieu van cam thuc va thanh doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te cac) OR (ke san)) ky nang ma hoi. hieu van cam thuc va thanh doi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((te cac) or (ke san)) ky nang ma hoi. hieu van cam thuc va thanh doi cua triet*.