Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
thu sach » tu sach, thuat sach, thuoc sach
cham duc » pham duc, cham soc, pham duy
hanh lai » hanh lam, hanh tai, thanh lap
su triet » su viet, su tien, ve triet
nang mai » nang ma, nang tai, lang mai
hieu va » hieu qua
sach ty » sach y, sach tu, sach thu
mai hoi » mai khoi, dai hoi, lai hoi
va hanh » van hanh, va thanh, va danh
ty nang » ky nang, ty xang, ty hang

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