Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nam xuat » nam xua, pham xuat, san xuat
nam luat » dan luat, dap luat, nam cua
va dinh » van dinh, va kinh, va tinh
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
va cau » van cau, va dau, va cao
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky lang xa hoi. hieu van ((nam xuat) OR (nam luat)) va dinh ((va cau) or (va cac)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang xa hoi. hieu van ((nam xuat) OR (nam luat)) va dinh ((va cau) OR (va cac)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky lang xa hoi. hieu van ((nam xuat) OR (nam luat)) va dinh ((va cau) or (va cac)) tre".
• Adding a wildcard symbol may retrieve word variants: te sac ky lang xa hoi. hieu van ((nam xuat) OR (nam luat)) va dinh ((va cau) or (va cac)) tre*.