Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
nang mai » nang ma, nang tai, lang mai
sach ly » sach y, sach lo, sach ty
va tinh » may tinh
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
ly nang » ky nang, ly hang, ly vang
va hanh » van hanh, va thanh, va danh
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 ly nang mai hoi. hieu va cam xuc ((va hanh) or (va tinh)) vi ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang mai hoi. hieu va cam xuc ((va hanh) OR (va tinh)) vi ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang mai hoi. hieu va cam xuc ((va hanh) or (va tinh)) vi ((cua triet) or (cua viet))*.