Perhaps you should try some spelling variations:
thuat sac » thuat sach, thuat san, thuat tac
truoc van » truong van, truoc bang, truoc cang
hieu van » hieu va, thien van, lieu va
truc van » truc va, thuc van, truc ban
nang xa » nang x, lang xa, nang ma
van lam » van nam
sac ky » cac ky, sai ky
vi hoa » voi hoa, vi hoc, va hoa

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sac ky nang xa hoi. hieu van lam ((truoc van) OR (truc van)) hanh vi hoa viet~".
• Adding a wildcard symbol may retrieve word variants: thuat sac ky nang xa hoi. hieu van lam ((truoc van) OR (truc van)) hanh vi hoa viet*.