Perhaps you should try some spelling variations:
su triet » su tien, ve triet
than lap » thanh lap, phan lap, toan lap
ban than » ban thanh, van thanh, ban hang
su sach » so sach, vu sach
cuc ban » cua ban, cac ban, cuu ban
cac cuc » cac cuoc, cac cua, cac nuoc
hieu va » lieu va, hieu qua
lang ha » long ha
lang xa » dang xay, lang van
su viet » so viet

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 y ((lang xa) OR (lang ha)) hoi. hieu va cac cuc ban than lap ((su triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((lang xa) OR (lang ha)) hoi. hieu va cac cuc ban than lap ((su triet) OR (su viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((lang xa) OR (lang ha)) hoi. hieu va cac cuc ban than lap ((su triet) or (su viet))".
• Adding a wildcard symbol may retrieve word variants: su sach y ((lang xa) OR (lang ha)) hoi. hieu va cac cuc ban than lap ((su triet) or (su viet))*.