Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
danh sai » dung sai, danh bat, danh dau
danh vai » danh va, doanh van, dang van
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
cao tuc » dao tuc, cao duc, cao suc
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
tuc va » thuc va, truc va, tuc xa
va cao » va cac, va co, va dao
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky nang mai hoi. hieu va cao tuc va ((danh vai) or (danh sai)) ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky nang mai hoi. hieu va cao tuc va ((danh vai) OR (danh sai)) ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky nang mai hoi. hieu va cao tuc va ((danh vai) or (danh sai)) ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: tu san ky nang mai hoi. hieu va cao tuc va ((danh vai) or (danh sai)) ((cua te) OR (cua tu))*.