Perhaps you should try some spelling variations:
trung minh » truong minh, trong minh, trung dinh
trung binh » trong binh, thuong binh, tran binh
bai trung » tai trung, ba trung, bai trong
can trung » san trung, van trung, con trung
sach thue » sach thu, sach thieu, sach tham
sach cua » mach cua, cach cua, sac cua
tu sach » thu sach, su sach, tu cach
thue va » thuc va, thuyet va, thuc vat
goi can » gioi can, voi can, goi san
ve giai » va giai, ve giao, de giai
me giai » de giai, ke giai, le giai
te sach » toc sach
va goi » va ngoi, va doi, va loi

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 cua ((me giai) OR (ve giai)) bai trung binh ) or ( te sach thue va goi can trung minh ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach cua ((me giai) OR (ve giai)) bai trung binh ) OR ( te sach thue va goi can trung minh )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tu sach cua ((me giai) OR (ve giai)) bai trung binh ) or ( te sach thue va goi can trung minh ))".
• Adding a wildcard symbol may retrieve word variants: (( tu sach cua ((me giai) OR (ve giai)) bai trung binh ) or ( te sach thue va goi can trung minh ))*.