Perhaps you should try some spelling variations:
thuat tach » thuat sach, thuat mach, thuat thanh
thuat tac » thuat tao, thuat tai, thuat tam
dua tren » dung tren
hanh vai » hanh vi, hanh va, hanh tai
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cao luc » bao luc, cao duc, cao suc
va hanh » van hanh, va thanh, va danh
va cao » va cac, va co, va dao
luc va » duc va, tuc va, loc va
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) OR (thuat tach)) ky nang xa hoi. hieu va cao luc va hanh vai ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat tac) OR (thuat tach)) ky nang xa hoi. hieu va cao luc va hanh vai ((dua tren) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat tac) OR (thuat tach)) ky nang xa hoi. hieu va cao luc va hanh vai ((dua tren) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: ((thuat tac) OR (thuat tach)) ky nang xa hoi. hieu va cao luc va hanh vai ((dua tren) or (cua te))*.