Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
tham nhung » thi nhung
dieu tinh » diep tinh, lieu tinh, dien tinh
manh toan » thanh toan, anh tuan, tinh toan
hoc dieu » hoc thieu, hoc hien
thi hong » thi cong, thi phuong, thi hanh
ban than » ban thanh, van thanh, ban hang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dieu tinh - hanh trinh ((tham nhung) OR (thi hong)) cong ((manh toan) OR (ban than)) ban~.
• Adding a wildcard symbol may retrieve word variants: hoc dieu tinh - hanh trinh ((tham nhung) or (thi hong)) cong ((manh toan) or (ban than)) ban*.