Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh te » thanh ve, thanh de, thanh le
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cau luc » cau phuc
te cua » tue cua, le cua, de cua
te sai » te tai, te bai, te lai
sai ky » sac ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ky ((nang xa) OR (lang xa)) hoi. hieu va ((cau luc) or (cau truc)) van thanh te cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky ((nang xa) OR (lang xa)) hoi. hieu va ((cau luc) OR (cau truc)) van thanh te cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sai ky ((nang xa) OR (lang xa)) hoi. hieu va ((cau luc) or (cau truc)) van thanh te cua tre".
• Adding a wildcard symbol may retrieve word variants: te sai ky ((nang xa) OR (lang xa)) hoi. hieu va ((cau luc) or (cau truc)) van thanh te cua tre*.