Perhaps you should try some spelling variations:
thi nang » thi cong, ki nang, thi hanh
van hanh » van thanh, ban hanh, van anh
thai cua » than cua, tai cuc, dai cua
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh
vuc van » duc van, luc van, thuc van
so sac » so sach, so dac
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sac ky nang xa hoi. ((thi van) or (thi nang)) bac vuc van hanh ((thai cua) OR (tri cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sac ky nang xa hoi. ((thi van) OR (thi nang)) bac vuc van hanh ((thai cua) OR (tri cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sac ky nang xa hoi. ((thi van) or (thi nang)) bac vuc van hanh ((thai cua) OR (tri cua)) tre".
• Adding a wildcard symbol may retrieve word variants: so sac ky nang xa hoi. ((thi van) or (thi nang)) bac vuc van hanh ((thai cua) OR (tri cua)) tre*.