Perhaps you should try some spelling variations:
bieu hien » dieu hien, dieu khien, bien phien
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
sach thu » sach thue, sach thieu, sach tham
cua viet » ca viet, hoa viet, cua vat
tang mai » tang tai, lang mai, sang mai
tang ma » mang may, tang van
cac xuc » cac nuoc, chat xuc, cac cuoc
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 thu ((tang mai) OR (tang ma)) hoi. bieu hien ((cac xuc) OR (cam xuc)) van hanh vai cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thu ((tang mai) OR (tang ma)) hoi. bieu hien ((cac xuc) OR (cam xuc)) van hanh vai cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sach thu ((tang mai) OR (tang ma)) hoi. bieu hien ((cac xuc) OR (cam xuc)) van hanh vai cua viet*.