Perhaps you should try some spelling variations:
trinh nhan » trinh han, trinh phan, trinh nha
nhung cong » dung cong, thong cong, hang cong
tai nhung » thai nhung, thi nhung, tai hung
doc hieu » toc thieu, hoc thieu
nhan tai » hang tai, van tai, toan tai
cong dan » cong san, cong tan, huong dan
toan tap » toan ban
han tap » han tai, nhan tao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (hoc hien)) manh - trinh nhan tai nhung cong dan ((han tap) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc hien)) manh - trinh nhan tai nhung cong dan ((han tap) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc hien)) manh - trinh nhan tai nhung cong dan ((han tap) or (toan tap))*.