Perhaps you should try some spelling variations:
thiet dang » thien dang, nhiet dong, nhiet nang
trung tuan » trung thanh, trung tam, tran tuan
thong cong » trong cong, tong cong, thong thong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
doanh cua » doanh luan
trung cua » truong cua, trung cap, dung cua
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than ban » thanh ban, toan ban, than man

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet dang - hanh ((doanh cua) or (((trung cua) OR (trung tuan)))) thong cong ban than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet dang - hanh ((doanh cua) OR (((trung cua) OR (trung tuan)))) thong cong ban than ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet dang - hanh ((doanh cua) or (((trung cua) OR (trung tuan)))) thong cong ban than ban".
• Adding a wildcard symbol may retrieve word variants: hoc thiet dang - hanh ((doanh cua) or (((trung cua) OR (trung tuan)))) thong cong ban than ban*.