Perhaps you should try some spelling variations:
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
va thanh » gia thanh, ban thanh, va tinh
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
cam duc » cam xuc, cao duc, pham duc
va danh » va dinh, va dan, va hanh
vi cua » vai cua, di cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang x hoi. ((hieu van) OR (thien van)) cam duc ((va thanh) or (va danh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang x hoi. ((hieu van) OR (thien van)) cam duc ((va thanh) OR (va danh)) vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang x hoi. ((hieu van) OR (thien van)) cam duc ((va thanh) or (va danh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang x hoi. ((hieu van) OR (thien van)) cam duc ((va thanh) or (va danh)) vi cua te*.