Perhaps you should try some spelling variations:
thien van » thi van
va thanh » gia thanh, ban thanh, va tinh
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
can ky » van ky, dan ky, ban ky
luc va » duc va, tuc va, loc va
ve cau » ke cau, va cau, le cau
ve cac » va cac, vien cac
tu can » tu ban, tu cac, thu canh

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu can ky dang xa hoi. ((thien van) or (hieu va)) cam luc va thanh ((ve cau) OR (ve cac)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky dang xa hoi. ((thien van) OR (hieu va)) cam luc va thanh ((ve cau) OR (ve cac)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu can ky dang xa hoi. ((thien van) or (hieu va)) cam luc va thanh ((ve cau) OR (ve cac)) tre".
• Adding a wildcard symbol may retrieve word variants: tu can ky dang xa hoi. ((thien van) or (hieu va)) cam luc va thanh ((ve cau) OR (ve cac)) tre*.