Perhaps you should try some spelling variations:
trinh chuan » trinh han, trinh quan, trinh luan
tranh chua » tranh cua, tranh chap, trinh chu
hien hanh » dieu hanh
dong cong » duong cong, dung cong, cong cong
dang cong » dung cong
manh toan » thanh toan, anh tuan, tinh toan
toan tap » toan 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 hien hanh - canh ((tranh chua) or (trinh chuan)) ((dong cong) OR (dang cong)) manh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - canh ((tranh chua) OR (trinh chuan)) ((dong cong) OR (dang cong)) manh toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien hanh - canh ((tranh chua) or (trinh chuan)) ((dong cong) OR (dang cong)) manh toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - canh ((tranh chua) or (trinh chuan)) ((dong cong) OR (dang cong)) manh toan tap*.