Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hanh lai » hanh lam, hanh tai, thanh lap
cua viet » ca viet, hoa viet, cua vat
nang xa » nang x, lang xa, nang ma
lang ha » long ha
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
cac loc » cac lop, cac toc, cac hoc
va hanh » van hanh, va thanh, va danh
lai cua » dai cua, hai cua, lai chau
ve cac » va cac, vien cac
loc va » hoc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (su sach)) ky ((nang xa) or (lang ha)) hoi. hieu ve cac loc va hanh lai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (su sach)) ky ((nang xa) OR (lang ha)) hoi. hieu ve cac loc va hanh lai cua viet.
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (su sach)) ky ((nang xa) or (lang ha)) hoi. hieu ve cac loc va hanh lai cua viet*.