Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
nang xa » nang x, lang xa, nang ma
cac tuc » cac tu, cac tac, cac nuoc
cac toc » cac toi, cac nuoc, cac thoi
dau thi » cau thi, dan thi, dao thi
cuu tre » cua tre, cau treo
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
va dau » va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky nang xa hoi. lieu va ((cac tuc) or (cac toc)) va dau thi ((cuu tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang xa hoi. lieu va ((cac tuc) OR (cac toc)) va dau thi ((cuu tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: su sac ky nang xa hoi. lieu va ((cac tuc) or (cac toc)) va dau thi ((cuu tre) or (cau tren))*.