Perhaps you should try some spelling variations:
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va hang » van hang, va lang, va hanh
va nang » van nang, da nang, cam nang
doi cuu » doi cua, doi cuoc
cuu tre » cua tre, cau tren, cau treo
ve nam » he nam, va nam, le nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (do sanh)) ky nang xa hoi. hieu ve nam thu ((va hang) OR (va nang)) doi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (do sanh)) ky nang xa hoi. hieu ve nam thu ((va hang) OR (va nang)) doi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (do sanh)) ky nang xa hoi. hieu ve nam thu ((va hang) OR (va nang)) doi cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (do sanh)) ky nang xa hoi. hieu ve nam thu ((va hang) OR (va nang)) doi cuu tre*.