Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
duc manh » duc anh, duc minh, duc tan
sach thu » sach thue, sach thieu, sach tham
hanh lai » hanh lam, hanh tai, thanh lap
lai cua » dai cua, hai cua, lai chau
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
va cam » va cham, va cac, va cao

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 y) or (sach thu)) nang xa hoi. hieu va cam ((duc manh) OR (suc manh)) hanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (sach thu)) nang xa hoi. hieu va cam ((duc manh) OR (suc manh)) hanh lai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach y) or (sach thu)) nang xa hoi. hieu va cam ((duc manh) OR (suc manh)) hanh lai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (sach thu)) nang xa hoi. hieu va cam ((duc manh) OR (suc manh)) hanh lai cua triet*.