Perhaps you should try some spelling variations:
thuat trinh » thuat tinh, thuyet trinh, thuat trong
chat thien » phat trien, cai thien, phat hien
cach thien » cach thiet, sach thieu, cai thien
phat trinh » phat trien, phat thanh, phat minh
giap tinh » gia tinh, diep tinh, tap tinh
giao tinh » giao trinh, gia tinh, giao thanh
hoc chat » hoc phat, hoc cao, hoc phan
hoc cach » hoc cac, hoc sach, cuoc cach
minh te » minh ve, minh de, minh tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((( kinh te hoc chat thien giap tinh ) or ( kinh te hoc cach thien giap tinh ))) or ( minh te hoc ((phat trinh) OR (thuat trinh)) giao tinh ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( kinh te hoc chat thien giap tinh ) OR ( kinh te hoc cach thien giap tinh ))) OR ( minh te hoc ((phat trinh) OR (thuat trinh)) giao tinh ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( kinh te hoc chat thien giap tinh ) or ( kinh te hoc cach thien giap tinh ))) or ( minh te hoc ((phat trinh) OR (thuat trinh)) giao tinh ))*".