Perhaps you should try some spelling variations:
hoach dinh » hoang dinh
tu hoach » thu hoach, tu hach, quy hoach
suc tich » su tich
dinh cu » dinh cuu, dinh chuc, dinh chau
so giao » hoc giao
tich so » tich bao, tinh son
vu suc » va suc, vu duc, ve suc
giai » gia, gian, gioi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu hoach dinh cu - so giao ) or ( vu suc tich so - so giai ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu hoach dinh cu - so giao ) OR ( vu suc tich so - so giai )).
• Adding a wildcard symbol may retrieve word variants: (( tu hoach dinh cu - so giao ) or ( vu suc tich so - so giai ))*.