Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
sach ky » sach y, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
va dinh » van dinh, va kinh, va tinh
dinh va » dinh van, dinh ve, tinh va
sac ky » cac ky, sai ky
le na » le nam, le va, le ha
le ta » le tai, le va

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 ky) or (sac ky)) nang xa hoi. hieu ((le na) or (le ta)) tu va dinh va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang xa hoi. hieu ((le na) OR (le ta)) tu va dinh va su triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang xa hoi. hieu ((le na) or (le ta)) tu va dinh va su triet*.