Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
truong cua » truong ca, truong quan, huong cua
truong cao » truong dai
thong cong » trong cong, tong cong, thong thong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
cong doan » cong dan, cong hoan, dong doanh
phan cau » phan dau, phan tu, phan lap
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 thiet tach - thanh ((truong cua) or (truong cao)) thong cong doan ((phan cau) OR (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - thanh ((truong cua) OR (truong cao)) thong cong doan ((phan cau) OR (phan cac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet tach - thanh ((truong cua) or (truong cao)) thong cong doan ((phan cau) OR (phan cac))".
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - thanh ((truong cua) or (truong cao)) thong cong doan ((phan cau) OR (phan cac))*.