Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tham duc » pham duc, tham du, than duc
ban hanh » ban hang
cua tre » cua te, cuu tre, dua tren
ban anh » ban banh, ban danh, bang anh
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky sang ma hoi. hieu va tham duc ((ban anh) or (ban hanh)) doi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky sang ma hoi. hieu va tham duc ((ban anh) OR (ban hanh)) doi ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky sang ma hoi. hieu va tham duc ((ban anh) or (ban hanh)) doi ((cua tre) or (cua triet))*.