Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
thai cua » than cua, tai cuc, dai cua
qua cac » cua cac
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
tu bat » tu ban, tu dat
tu san » thu san, tu ban, tu can
nang o » nang co, nang ho, nang ro
o lao » o lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu bat) or (tu san)) ky nang o lao. hieu qua cac xuc van hanh ((thai cua) OR (tri cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu bat) OR (tu san)) ky nang o lao. hieu qua cac xuc van hanh ((thai cua) OR (tri cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu bat) or (tu san)) ky nang o lao. hieu qua cac xuc van hanh ((thai cua) OR (tri cua)) tre*".