Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van cach » va cach, van canh, vat cach
vu sach » vu bach, vu khach
su sach » so sach
ky lang » ky dang, ky tang, tay lang
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (su sach)) ((ky lang) or (ky nang)) xa hoi. hieu van cach thuc va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) ((ky lang) OR (ky nang)) xa hoi. hieu van cach thuc va hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (su sach)) ((ky lang) or (ky nang)) xa hoi. hieu van cach thuc va hanh vi cua triet*.