Perhaps you should try some spelling variations:
hoach dinh » hoang dinh
ton giao » toan giao, hoc giao, so giao
su hoach » quy hoach, thu hoach, qui hoach
tinh su » trinh su, hinh su, tinh tu
dinh su » dinh so, hinh su, dinh cu
te sac » te sach, te cac
te san » te ban, ke san, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((te sac) OR (te san)) tinh su - ton giao ) or ( su hoach dinh su - ton giao ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((te sac) OR (te san)) tinh su - ton giao ) OR ( su hoach dinh su - ton giao )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((te sac) OR (te san)) tinh su - ton giao ) or ( su hoach dinh su - ton giao ))".
• Adding a wildcard symbol may retrieve word variants: (( ((te sac) OR (te san)) tinh su - ton giao ) or ( su hoach dinh su - ton giao ))*.