Perhaps you should try some spelling variations:
trinh dinh » trinh kinh, trinh sinh, trinh dung
hieu manh » chieu xanh, hieu nganh, dieu hanh
tuong tac » cong tac, luong tai, tuong lai
doc hieu » toc thieu, hoc thieu, hoc hien
tong tap » trong tan, cong tac, tong hop
doan cao » doanh cao, toan cao, doan cap
dinh va » dinh van, dinh ve, tinh va
va han » va phan, van han, va hanh

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 manh - trinh dinh va han ((tong tap) or (tuong tac)) doan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - trinh dinh va han ((tong tap) OR (tuong tac)) doan cao.
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - trinh dinh va han ((tong tap) or (tuong tac)) doan cao*.