Perhaps you should try some spelling variations:
thanh trung » thanh tung
thiet tach » chiet tach, thien hach, thuat tach
chong cong » cong cong, thong cong, cuong cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trung cua » truong cua, trung tuan, trung cap
cua chong » cua cong, cua chung, cua khong
thanh lap » thanh san, thanh hai, thanh van
cong san » cong tac
phan cac » nhan cach, phan dau, phan van
phan lap » phan dau

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 tach - thanh trung cua chong cong san ((((phan cac) OR (phan lap))) or (thanh lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - thanh trung cua chong cong san ((((phan cac) OR (phan lap))) OR (thanh lap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet tach - thanh trung cua chong cong san ((((phan cac) OR (phan lap))) or (thanh lap))".
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - thanh trung cua chong cong san ((((phan cac) OR (phan lap))) or (thanh lap))*.