Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dinh tri » chinh tri
dua tren » dung tren
nang ma » tang ma, sang ma, nang cao
nam duc » nam duoc, pham duc, nam thuc
va dinh » van dinh, va kinh, va tinh
te sai » te tai, te bai, te lai
sai ky » sac ky
ma hoi » mai hoi, xa hoi, ma hoa
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 van nam duc va dinh tri ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky nang ma hoi. hieu van nam duc va dinh tri ((dua tren) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: te sai ky nang ma hoi. hieu van nam duc va dinh tri ((dua tren) or (cua te))*.