Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
ban hanh » ban hang
phan tai » pham tai, nhan tai, phan thi
su triet » su viet, su tien, ve triet
hieu ve » hieu van
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
tai ban » tai san, tai ngan, tai benh
ty lang » tay lang, ty xang, ty hang
hanh ki » hanh vi, hanh ky, hanh kien
hieu va » lieu va
ki su » ky su

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc sach ty lang xa hoi. ((hieu ve) or (((hieu va) OR (hieu qua)))) phan tai ban hanh ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach ty lang xa hoi. ((hieu ve) OR (((hieu va) OR (hieu qua)))) phan tai ban hanh ki su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach ty lang xa hoi. ((hieu ve) or (((hieu va) OR (hieu qua)))) phan tai ban hanh ki su triet".
• Adding a wildcard symbol may retrieve word variants: nuoc sach ty lang xa hoi. ((hieu ve) or (((hieu va) OR (hieu qua)))) phan tai ban hanh ki su triet*.