Perhaps you should try some spelling variations:
dinh tri » chinh tri
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
nam duc » nam duoc, pham duc, nam thuc
va dinh » van dinh, va kinh, va tinh
cua tre » cuu tre, cua triet, dua tren
te sai » te tai, te bai, te lai
sai ky » sac ky
ma hoi » mai hoi, xa hoi, ma hoa
va nam » van nam, ha nam, va nay
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ky nang ma hoi. hieu va nam duc va dinh tri ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sai ky nang ma hoi. hieu va nam duc va dinh tri ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sai ky nang ma hoi. hieu va nam duc va dinh tri ((cua tre) OR (cua te))*.