Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
van thanh » ban thanh, van tuan
hieu viec » nhieu viec, hieu ve, sieu viet
thu nang » thi nang, thu hang, tho nang
thanh vi » hanh vi, thanh va, thanh ve
thu bang » thu ban, thu hang, chu bang
tu sach » thu sach, su sach, te sach
cuu tre » cua tre, cau tren, cau treo
cac tu » cac thu, cach tu, cac du
tu van » tu va
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((thu nang) OR (thu bang)) xa hoi. ((hieu viec) or (hieu hien)) cac tu van thanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((thu nang) OR (thu bang)) xa hoi. ((hieu viec) OR (hieu hien)) cac tu van thanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((thu nang) OR (thu bang)) xa hoi. ((hieu viec) or (hieu hien)) cac tu van thanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((thu nang) OR (thu bang)) xa hoi. ((hieu viec) or (hieu hien)) cac tu van thanh vi cuu tre*.