Perhaps you should try some spelling variations:
toai cuc » thoai cac, thi cuc, tong cuc
nang xa » nang x, lang xa, nang ma
va dinh » van dinh, va kinh, va tinh
tu dan » tuc dan, tu ban, cu dan
dan ky » van ky
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu dan ky nang xa hoi. hieu ((ve cam) OR (va cam)) tuc va dinh ((toai cuc) or (tai cuc)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dan ky nang xa hoi. hieu ((ve cam) OR (va cam)) tuc va dinh ((toai cuc) OR (tai cuc)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu dan ky nang xa hoi. hieu ((ve cam) OR (va cam)) tuc va dinh ((toai cuc) or (tai cuc)) viet".
• Adding a wildcard symbol may retrieve word variants: tu dan ky nang xa hoi. hieu ((ve cam) OR (va cam)) tuc va dinh ((toai cuc) or (tai cuc)) viet*.