Perhaps you should try some spelling variations:
chat vuc » chat xuc, chat huu, chat cua
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
hanh lai » hanh lam, hanh tai, thanh lap
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
lai cua » dai cua, hai cua, lai chau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (su sach)) ky nang x ho. hieu ve ((chat vuc) OR (chat va)) van hanh lai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (su sach)) ky nang x ho. hieu ve ((chat vuc) OR (chat va)) van hanh lai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (su sach)) ky nang x ho. hieu ve ((chat vuc) OR (chat va)) van hanh lai cua viet".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) ky nang x ho. hieu ve ((chat vuc) OR (chat va)) van hanh lai cua viet*.