Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
va thanh » gia thanh, ban thanh, va tinh
thanh de » hanh de, thanh ve, thanh do
su triet » su viet, su tien, ve triet
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
ma hoi » mai hoi, xa hoi, ma hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang ma hoi. hieu va pham duc va thanh de ((cua triet) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang ma hoi. hieu va pham duc va thanh de ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang ma hoi. hieu va pham duc va thanh de ((cua triet) OR (su triet))*.