Perhaps you should try some spelling variations:
dung tren » dung trong, dung trung
dinh tri » chinh tri
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
nay duc » ngay doc
va dinh » van dinh, va kinh, va tinh
tai ky » thai ky, trai ky, sai ky
va nay » va ngay, va cay
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 tai ky nang xa hoi. hieu va nay duc va dinh tri ((((dua tren) OR (dung tren))) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te tai ky nang xa hoi. hieu va nay duc va dinh tri ((((dua tren) OR (dung tren))) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te tai ky nang xa hoi. hieu va nay duc va dinh tri ((((dua tren) OR (dung tren))) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: te tai ky nang xa hoi. hieu va nay duc va dinh tri ((((dua tren) OR (dung tren))) or (cua te))*.