Perhaps you should try some spelling variations:
thuat sac » thuat sach, thuat san, thuat tac
thuong va » truong va, thong va, thuong mai
thuoc va » thuc va, thuoc ma, thuoc tai
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
vi hoa » voi hoa, vi hoc, va hoa
va lap » va dap
sac ky » cac ky, sai ky
va lam » van lam

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sac ky dang xa hoi. hieu ((va lam) OR (va lap)) ((thuoc va) or (thuong va)) hanh vi hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sac ky dang xa hoi. hieu ((va lam) OR (va lap)) ((thuoc va) OR (thuong va)) hanh vi hoa viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sac ky dang xa hoi. hieu ((va lam) OR (va lap)) ((thuoc va) or (thuong va)) hanh vi hoa viet".
• Adding a wildcard symbol may retrieve word variants: thuat sac ky dang xa hoi. hieu ((va lam) OR (va lap)) ((thuoc va) or (thuong va)) hanh vi hoa viet*.