Perhaps you should try some spelling variations:
hoc trinh » doc trinh, hoc tinh, hoc sinh
trinh san » trinh han, trinh quan, trinh toan
tong cong » trong cong, cong cong, dung cong
ban thanh » ban hanh, ban hang
thanh lap » thanh san, phan lap, thanh hai
tang van » dang van, hoang van, trong van
cong ban » cong bang, cong san, cong tan
tang va » trang va, thang va, tang vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc trinh san - anh ((tang va) OR (tang van)) tong cong ban thanh lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc trinh san - anh ((tang va) OR (tang van)) tong cong ban thanh lap".
• Adding a wildcard symbol may retrieve word variants: hoc trinh san - anh ((tang va) OR (tang van)) tong cong ban thanh lap*.