Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
sach thu » sach thue, sach thieu, sach tham
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
cham duc » pham duc, cham soc, pham duy
thu nang » thi nang, thu hang, thu bang
hieu va » lieu va, hieu qua
va cham » va chat, va tham
duc van » duc va, duc tan, duc manh
lai cua » dai cua, hai cua, lai chau
su sach » so sach, vu sach
5 hoi » o hoi
x hoi » o hoi, x ho

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 thu nang ((((x hoi) or (5 hoi))) or (xa hoi)). hieu va cham duc van hanh lai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu nang ((((x hoi) OR (5 hoi))) OR (xa hoi)). hieu va cham duc van hanh lai cua viet.
• Adding a wildcard symbol may retrieve word variants: su sach thu nang ((((x hoi) or (5 hoi))) or (xa hoi)). hieu va cham duc van hanh lai cua viet*.