Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
cham duc » pham duc, cham soc, pham duy
hanh de » hanh ve, hanh kem
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, te sach, tu cach
hieu va » lieu va, hieu qua
tu nang » tru nang, tu nong, tu nano
su sach » so sach, vu sach
va cham » va chat, va tham

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