Perhaps you should try some spelling variations:
cua triet » su triet, 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
cua viet » ca viet, hoa viet, cua vat
nang tai » hang tai, tang tai, sang tai
hieu va » hieu qua
sach ty » sach y, sach tu, sach thu
tai hoi » tai khoi, dai hoi, tai hai
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 tai hoi. ((hieu va) or (lieu va)) cham duc va hanh lai ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang tai hoi. ((hieu va) OR (lieu va)) cham duc va hanh lai ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty nang tai hoi. ((hieu va) or (lieu va)) cham duc va hanh lai ((cua triet) OR (cua viet))".
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang tai hoi. ((hieu va) or (lieu va)) cham duc va hanh lai ((cua triet) OR (cua viet))*.