Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
cua viet » ca viet, hoa viet, cua vat
nang xa » nang x, lang xa, nang ma
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va danh, ban hanh
ve cai » va cai, ve cac, ve tai
vi cua » vai cua, di cua

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 xa hoi. hieu ((ve cai) or (ve cham)) luc ((va hanh) OR (va thanh)) vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang xa hoi. hieu ((ve cai) OR (ve cham)) luc ((va hanh) OR (va thanh)) vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang xa hoi. hieu ((ve cai) or (ve cham)) luc ((va hanh) OR (va thanh)) vi cua viet".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang xa hoi. hieu ((ve cai) or (ve cham)) luc ((va hanh) OR (va thanh)) vi cua viet*.