Perhaps you should try some spelling variations:
thanh lam » thanh lap, hanh lam, thanh nam
cua viet » ca viet, hoa viet, cua dieu
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cuc ban » cua ban, cuu ban, duc ban
cac ban » cac dan, cac van, can ban
y lang » o lang, _ lang, tay lang

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