Perhaps you should try some spelling variations:
dieu tinh » diep tinh, lieu tinh, dien tinh
dung cong » dung trong
hoc dieu » hoc thieu, hoc hien
tang cua » hang cua, tang luan, thong cua
mang cua » manh cua, dung cua, ban cua
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc dieu tinh - hanh ((tang cua) or (mang cua)) dung cong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dieu tinh - hanh ((tang cua) OR (mang cua)) dung cong tan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc dieu tinh - hanh ((tang cua) or (mang cua)) dung cong tan toan ban*.