Perhaps you should try some spelling variations:
thien van » thi van
thu sach » thuat sach, thuoc sach, thu hoach
ban hanh » ban hang
tu sach » su sach, te sach, tu cach
nano xa » nano va, nano bac, nano cau
nam cuc » nam cac, nam cua, nam thuc
cuc ban » cua ban, cac ban, cuu ban
cua tre » cuu tre, cua triet, dua tren
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)) truc nano xa hoi. thien van nam cuc ban hanh vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) truc nano xa hoi. thien van nam cuc ban hanh vi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) truc nano xa hoi. thien van nam cuc ban hanh vi ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) truc nano xa hoi. thien van nam cuc ban hanh vi ((cua tre) or (cua te))*.