Perhaps you should try some spelling variations:
thuat tac » thuat tach, thuat tao, thuat tai
dua tren » dung tren
hanh vai » hanh vi, hanh va, hanh tai
va hanh » van hanh, va thanh, va danh
xuc va » duc va, tuc va, luc va
cua te » cua tu
tac ky » tac ke, cac ky, tap ky
va cao » va cac, va dao, va bao
x hoi » xa hoi, o hoi, x ho
va co » vo co

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat tac ky nang x hoi. hieu ((va cao) OR (va co)) xuc va hanh vai ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat tac ky nang x hoi. hieu ((va cao) OR (va co)) xuc va hanh vai ((dua tren) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat tac ky nang x hoi. hieu ((va cao) OR (va co)) xuc va hanh vai ((dua tren) or (cua te))*".