Perhaps you should try some spelling variations:
xa thanh » va thanh, ha thanh, ta thanh
su sach » so sach, vu sach
ty lang » tay lang, ty xang, tu lang
ty hang » ly hang, ty xang, thi hang
hieu ve » hieu va, hieu van
cac tuc » cac toc, cac tu, cac tac
hai cua » thai cua, hoi cua, lai cua
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ty lang) OR (ty hang)) xa hoi. hieu ve cac tuc xa thanh ((hai cua) or (dai cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty lang) OR (ty hang)) xa hoi. hieu ve cac tuc xa thanh ((hai cua) OR (dai cua)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty lang) OR (ty hang)) xa hoi. hieu ve cac tuc xa thanh ((hai cua) or (dai cua)) tu".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty lang) OR (ty hang)) xa hoi. hieu ve cac tuc xa thanh ((hai cua) or (dai cua)) tu*.