Perhaps you should try some spelling variations:
thuat tac » thuat tach, thuat tao, thuat tai
cham tuc » nham thuc, pham thuc, tham thuc
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
xa hanh » xa thanh, xa khanh, va hanh
tac ky » tac ke, cac ky, tap ky
vit ca » viet ca, viet cau
vi ca » li ca, va ca, vi ha

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 hoi. hieu va cham tuc xa hanh ((vi ca) OR (vit ca)) viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat tac ky nang xa hoi. hieu va cham tuc xa hanh ((vi ca) OR (vit ca)) viet".
• Adding a wildcard symbol may retrieve word variants: thuat tac ky nang xa hoi. hieu va cham tuc xa hanh ((vi ca) OR (vit ca)) viet*.