Perhaps you should try some spelling variations:
hanh dao » lanh dao, thanh dat, thanh dam
van hanh » van thanh, ban hanh, van anh
tran van » luan van
dao cua » dai cua, day cua, dan cua
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
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 ty) or (sac ky)) nang xa hoi. thien ((van chat) OR (cao chat)) tran van hanh dao cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sac ky)) nang xa hoi. thien ((van chat) OR (cao chat)) tran van hanh dao cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sac ky)) nang xa hoi. thien ((van chat) OR (cao chat)) tran van hanh dao cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sac ky)) nang xa hoi. thien ((van chat) OR (cao chat)) tran van hanh dao cua te*.