Perhaps you should try some spelling variations:
so triet » su triet, so thiet, bo triet
nghe nam » nghe lam, nghiep nam, nghe nano
hanh tai » thanh tai, hang tai, han tai
lang hoa » hang hoa, lang ha, hoang hoa
nang hoa » nang hoat, hang hoa, nang hoc
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
thu sac » thu sach, thu san, thu xac
ve nam » he nam, va nam, le nam
sac ky » cac ky, sai ky
tai so » tai sao, dai so, tai co

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sac ky ((lang hoa) or (nang hoa)) hoi. hieu ((ve nam) or (nghe nam)) thuc va hanh tai so triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky ((lang hoa) OR (nang hoa)) hoi. hieu ((ve nam) OR (nghe nam)) thuc va hanh tai so triet.
• Adding a wildcard symbol may retrieve word variants: thu sac ky ((lang hoa) or (nang hoa)) hoi. hieu ((ve nam) or (nghe nam)) thuc va hanh tai so triet*.