Perhaps you should try some spelling variations:
khanh vinh » thanh vinh, khanh linh, thanh binh
hanh vinh » thanh vinh, hanh tinh, anh vinh
nang mai » nang ma, nang tai, lang mai
hieu van » hieu va, thien van, lieu va
cac luc » cau luc, coc luc, cac nuoc
luc van » luoc van, luu van, duc van
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va
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: tu cac ky nang mai hoi. ((hieu ve) or (hieu van)) cac luc van ((hanh vinh) OR (khanh vinh)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang mai hoi. ((hieu ve) OR (hieu van)) cac luc van ((hanh vinh) OR (khanh vinh)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang mai hoi. ((hieu ve) or (hieu van)) cac luc van ((hanh vinh) OR (khanh vinh)) cua te".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang mai hoi. ((hieu ve) or (hieu van)) cac luc van ((hanh vinh) OR (khanh vinh)) cua te*.