Perhaps you should try some spelling variations:
dong thuong » cong thuong, dong thong, dung thuong
thuong minh » thong minh, truong minh, thuong binh
phuong tin » phuong tien, thuong tin, phuong trinh
trai dong » thai dong, tai dong, trai dung
doc sach » hoc sach, toc sach, nuoc sach
te sach » toc sach
sach xa » sach dao, sach nha, sach bai
me trai » me tri, ve trai
ca ve » ca va, va ve
xa me » ba me, ca me
c va » co va, cu va, _ va
giai » giao, gia, gian
doan » doanh, dan, toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( doc sach ((ca ve) or (c va)) giai doan phuong tin ) or ( te sach xa me trai dong thuong minh ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( doc sach ((ca ve) OR (c va)) giai doan phuong tin ) OR ( te sach xa me trai dong thuong minh )).
• Adding a wildcard symbol may retrieve word variants: (( doc sach ((ca ve) or (c va)) giai doan phuong tin ) or ( te sach xa me trai dong thuong minh ))*.