Perhaps you should try some spelling variations:
thai va » thai van
ve chat » va chat, van chat
ve cham » va cham, vu cham, ve chim
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
xuc va » duc va, tuc va, luc va
va han » va phan, van han, va hanh
tai va » mai va, tri va, dai va
su sac » su sach, su cac, su xac
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky nang xa hoi. hieu ((ve cham) or (ve chat)) xuc va han ((tai va) OR (thai va)) thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang xa hoi. hieu ((ve cham) OR (ve chat)) xuc va han ((tai va) OR (thai va)) thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang xa hoi. hieu ((ve cham) or (ve chat)) xuc va han ((tai va) OR (thai va)) thiet".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang xa hoi. hieu ((ve cham) or (ve chat)) xuc va han ((tai va) OR (thai va)) thiet*.