Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
thanh vai » thanh hai, thanh van, thanh tai
van thanh » ban thanh, van tuan
cua viet » ca viet, hoa viet, cua vat
dai hoi » dai hoc, dai hai, dai moi
tu nong » tu dong, tu cong, tu tong
cac xuc » cac nuoc, chat xuc, cac cuoc
tu nang » tru nang, tu nano, tu lang
vai cua » dai cua, hai cua, lai cua
tu sach » thu sach, su sach, te sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((tu nang) OR (tu nong)) dai hoi. hieu hien ((cac xuc) or (cam xuc)) van thanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tu nang) OR (tu nong)) dai hoi. hieu hien ((cac xuc) OR (cam xuc)) van thanh vai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((tu nang) OR (tu nong)) dai hoi. hieu hien ((cac xuc) or (cam xuc)) van thanh vai cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((tu nang) OR (tu nong)) dai hoi. hieu hien ((cac xuc) or (cam xuc)) van thanh vai cua viet*.