Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
cuc tre » duc tre, cua tre, cuu tre
vuc van » duc van, luc van, thuc van
nang ro » nang co, nang ho, nang ra
cac vuc » cac nuoc, cac vung, cac cuoc
hieu ve » hieu va
tu bat » tu ban, tu dat
ro lai » o lai, ho lai, ru lai
tu san » thu san, tu ban, tu can

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 ro lai. ((hieu ve) or (hieu van)) cac vuc van hanh tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu bat) OR (tu san)) ky nang ro lai. ((hieu ve) OR (hieu van)) cac vuc van hanh tai cuc tre.
• Adding a wildcard symbol may retrieve word variants: ((tu bat) or (tu san)) ky nang ro lai. ((hieu ve) or (hieu van)) cac vuc van hanh tai cuc tre*.