Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
tu nano » truc nano
nano xa » nano va, nano bac, nano cau
danh di » danh du, xanh di, danh dien
va danh » va dinh, va dan, va hanh
di cua » dai cua, doi cua, de cua
tuc va » thuc va, truc va, tuc xa
ve cai » va cai, ve tai, ve cau
ve cac » va cac, vien cac
cua te » cua tu

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) OR (thu sach)) tu nano xa hoi. hieu ((ve cai) or (ve cac)) tuc va danh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) tu nano xa hoi. hieu ((ve cai) OR (ve cac)) tuc va danh di cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) tu nano xa hoi. hieu ((ve cai) or (ve cac)) tuc va danh di cua te*".