Perhaps you should try some spelling variations:
nang vinh » nang kinh, nang sinh, dang vinh
vinh cuu » dinh cuu, sinh cua, dinh cu
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
duc ban » duc van, dua ban, duc man
cuu tre » cua tre, cau tren, cau treo
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ve cac ky lang xa hoi. ((lieu va) or (hieu qua)) cam ((duc ban) OR (duc tan)) nang vinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ve cac ky lang xa hoi. ((lieu va) OR (hieu qua)) cam ((duc ban) OR (duc tan)) nang vinh cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ve cac ky lang xa hoi. ((lieu va) or (hieu qua)) cam ((duc ban) OR (duc tan)) nang vinh cuu tre".
• Adding a wildcard symbol may retrieve word variants: ve cac ky lang xa hoi. ((lieu va) or (hieu qua)) cam ((duc ban) OR (duc tan)) nang vinh cuu tre*.