Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
thong cong » trong cong, tong cong, thong thong
hieu manh » chieu xanh, dieu hanh, hien hanh
cong tinh » cong trinh, cong vinh, long tinh
trung va » truong va, trang va, trung ha
tran van » luan van
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) OR (hieu nganh)) - thanh ((trung va) or (tran van)) thong cong tinh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (hieu nganh)) - thanh ((trung va) OR (tran van)) thong cong tinh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) OR (hieu nganh)) - thanh ((trung va) or (tran van)) thong cong tinh toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) OR (hieu nganh)) - thanh ((trung va) or (tran van)) thong cong tinh toan cao*.