Perhaps you should try some spelling variations:
thanh trung » thanh tung
hoc nghien » hoc hien
hoc nhiet » hoc hien, hoc viet, hoc thieu
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trung cap » truong cao, trung tam
trong dan » trong dang, trong san, trong tan
cap dung » ap dung, cao dung, chan dung
dan van » dang van, doan van, dao van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((hoc nhiet) OR (hoc nghien))) or (hoc thiet)) tach - thanh trung cap dung trong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((hoc nhiet) OR (hoc nghien))) OR (hoc thiet)) tach - thanh trung cap dung trong dan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((hoc nhiet) OR (hoc nghien))) or (hoc thiet)) tach - thanh trung cap dung trong dan van ban".
• Adding a wildcard symbol may retrieve word variants: ((((hoc nhiet) OR (hoc nghien))) or (hoc thiet)) tach - thanh trung cap dung trong dan van ban*.