Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
dieu tinh » diep tinh, lieu tinh, dien tinh
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
manh toan » thanh toan, anh tuan, tinh toan
hoc dieu » hoc thieu, hoc hien
tang cua » mang cua, hang cua, tang luan
tan toan » tan tran, tap toan, van toan
van tuan » van quan, van ban, anh tuan

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 nhung cong ((((tan toan) or (manh toan))) or (van tuan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dieu tinh - hanh tang cua nhung cong ((((tan toan) OR (manh toan))) OR (van tuan)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc dieu tinh - hanh tang cua nhung cong ((((tan toan) or (manh toan))) or (van tuan)) cao*.