Perhaps you should try some spelling variations:
chay tren » thai tren, ca tren, cau tren
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
tai chay » toan chay, trai chan, tai chi
nang xa » nang x, lang xa, nang ma
cau luc » cau truc, cau phuc
va hanh » va thanh, va danh, ban hanh
tu can » tu ban, tu cac, thu canh
can ky » van ky, dan ky, ban ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu can ky nang xa hoi. hieu van ((cau luc) or (cam xuc)) ((va hanh) OR (van hanh)) tai chay tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky nang xa hoi. hieu van ((cau luc) OR (cam xuc)) ((va hanh) OR (van hanh)) tai chay tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu can ky nang xa hoi. hieu van ((cau luc) or (cam xuc)) ((va hanh) OR (van hanh)) tai chay tren".
• Adding a wildcard symbol may retrieve word variants: tu can ky nang xa hoi. hieu van ((cau luc) or (cam xuc)) ((va hanh) OR (van hanh)) tai chay tren*.