Perhaps you should try some spelling variations:
sach nhat » sach nha, sach phat, sach tham
nhat hanh » nhat ban, nhat minh
hanh cau » nhanh cau, hang cau, hanh cac
hieu cao » chieu cao, hieu cac, hieu ca
chat tuc » chat xuc, luat tuc, chat huu
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, ban hanh
tuc va » thuc va, truc va, tuc xa
dai su » dai so, dan su, lai su

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 nhat hanh cau hoi. hieu cao chat tuc va hanh ((dai su) or (((dai sua) OR (dai cua)))) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach nhat hanh cau hoi. hieu cao chat tuc va hanh ((dai su) OR (((dai sua) OR (dai cua)))) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach nhat hanh cau hoi. hieu cao chat tuc va hanh ((dai su) or (((dai sua) OR (dai cua)))) triet".
• Adding a wildcard symbol may retrieve word variants: tu sach nhat hanh cau hoi. hieu cao chat tuc va hanh ((dai su) or (((dai sua) OR (dai cua)))) triet*.