Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
nang noi » nang doc
nang doi » nang doc, hang doi, nang dong
te sach » toc sach
hieu ve » hieu va, hieu van
ky lang » ky dang, ky tang, tay lang
ve cac » va cac, vien cac
cac tu » cac thu, cach tu, cac du
tu xa » tu xay, tu va, te xa

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 ((ky lang) OR (ky nang)) xa hoi. hieu ve cac tu xa ((nang doi) or (nang noi)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky lang) OR (ky nang)) xa hoi. hieu ve cac tu xa ((nang doi) OR (nang noi)) va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky lang) OR (ky nang)) xa hoi. hieu ve cac tu xa ((nang doi) or (nang noi)) va triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) OR (ky nang)) xa hoi. hieu ve cac tu xa ((nang doi) or (nang noi)) va triet*.