Perhaps you should try some spelling variations:
chau tre » chay tren, chau tho, cau tra
van hanh » van thanh, ban hanh, van anh
luoc van » luoc can, luoc va, luc van
cau luoc » cau luc, muu luoc, hau loc
tu sach » thu sach, su sach, te sach
cho tre » cho thue, khoe tre
hieu ve » hieu va, hieu van
ty hang » ly hang, thi hang, thu hang
ve cau » ke cau, va cau, ve cac

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 ((ty hang) or (ty xang)) x ho. hieu ve cau luoc van hanh kem ((chau tre) OR (cho tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty hang) OR (ty xang)) x ho. hieu ve cau luoc van hanh kem ((chau tre) OR (cho tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty hang) or (ty xang)) x ho. hieu ve cau luoc van hanh kem ((chau tre) OR (cho tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty hang) or (ty xang)) x ho. hieu ve cau luoc van hanh kem ((chau tre) OR (cho tre))*.