Perhaps you should try some spelling variations:
nganh ky » nganh y, nganh xay, hanh ky
thanh ky » hanh ky, than ky, thanh tay
cua tre » cua te, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
cuu tre » cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((thanh ky) or (nganh ky)) nang ma hoi. hieu ve cam duc va hanh vi ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((thanh ky) OR (nganh ky)) nang ma hoi. hieu ve cam duc va hanh vi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((thanh ky) or (nganh ky)) nang ma hoi. hieu ve cam duc va hanh vi ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: so ((thanh ky) or (nganh ky)) nang ma hoi. hieu ve cam duc va hanh vi ((cua tre) OR (cuu tre))*.