Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
lang mai » lang dai, lang hai, lang man
hanh lai » hanh lam, hanh tai, thanh lap
cham duc » pham duc, cham soc, pham duy
thu sach » tu sach, thuat sach, thuoc sach
nang mai » nang ma, nang tai, nang cai
sach ty » sach y, sach tu, sach thu
va hanh » van hanh, va thanh, va danh
lai cua » dai cua, hai cua, lai chau
hieu va » hieu qua

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