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
nang xa » lang xa, nang ma, mang xa
hieu va » lieu va, hieu qua
cao xuc » cam xuc, cao duc, cao suc
va cao » va cac, va co, va dao
xuc va » duc va, tuc va, luc va
tac ky » tac ke, cac ky, tap ky
cua te » cua tu

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 xa) OR (nang x)) hoi. hieu va cao 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 xa) OR (nang x)) hoi. hieu va cao 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 xa) OR (nang x)) hoi. hieu va cao xuc va hanh vai ((dua tren) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: thuat tac ky ((nang xa) OR (nang x)) hoi. hieu va cao xuc va hanh vai ((dua tren) or (cua te))*.