Perhaps you should try some spelling variations:
nhan thuc » nhan luc, dan thuc, toan thuc
van thanh » van tuan
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
nang lai » nang tai, mang lai, nang cai
vi nhan » li nhan, va nhan, vi phan
su sach » so sach, vu sach
lai hoi » dai hoi, lai hoa, lai roi
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (thu sach)) y nang lai hoi. hieu ve cam xuc ((van thanh) OR (ban thanh)) vi nhan thuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu sach)) y nang lai hoi. hieu ve cam xuc ((van thanh) OR (ban thanh)) vi nhan thuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (thu sach)) y nang lai hoi. hieu ve cam xuc ((van thanh) OR (ban thanh)) vi nhan thuc".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thu sach)) y nang lai hoi. hieu ve cam xuc ((van thanh) OR (ban thanh)) vi nhan thuc*.