Perhaps you should try some spelling variations:
trinh lich » trinh kinh
hoach dinh » hoang dinh
vu trinh » va trinh, qua trinh, quy trinh
ton giao » toan giao, hoc giao, don gian
su hoach » quy hoach, thu hoach, qui hoach
dinh cu » dinh cuu, dinh chuc, dinh chau
so giao » so giai, hoc giao

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

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