Perhaps you should try some spelling variations:
thanh trung » thanh tung
khien bang » phien ban, khien dong
hoc khien » hoc hien, hoc nghien, hoc thieu
trung dap » trung cap, trung dai, trung dam
dap nhung » vap nhung, va nhung, dap ung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than cap » khan cap, thanh lap, thanh cac
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc khien bang - thanh trung dap nhung ((cong dan) or (cong san)) ((than cap) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc khien bang - thanh trung dap nhung ((cong dan) OR (cong san)) ((than cap) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: hoc khien bang - thanh trung dap nhung ((cong dan) or (cong san)) ((than cap) or (phan cac))*.