Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nhan luc » nang luc
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
chat luc » chat xuc, chat lua, chat huu
cua viet » ca viet, hoa viet, cua vat
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
so sach » so sanh, bo sach, co sach
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 (so sach)) ty nang x ho. hieu ve ((chat luc) OR (nhan luc)) van hanh lai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (so sach)) ty nang x ho. hieu ve ((chat luc) OR (nhan luc)) van hanh lai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (so sach)) ty nang x ho. hieu ve ((chat luc) OR (nhan luc)) van hanh lai cua viet".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (so sach)) ty nang x ho. hieu ve ((chat luc) OR (nhan luc)) van hanh lai cua viet*.