Perhaps you should try some spelling variations:
tmanh trung » thanh trung, thanh tung, manh tung
manh trung » manh tung, thanh trung, manh hung
hoc nhiet » hoc nghien, hoc hien, hoc viet
hoc thiet » hoc thieu, hoc thuyet, hoc hien
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 thiet)) tach - ((manh trung) or (tmanh trung)) cap dung trong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc nhiet) OR (hoc thiet)) tach - ((manh trung) OR (tmanh trung)) cap dung trong dan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc nhiet) OR (hoc thiet)) tach - ((manh trung) or (tmanh trung)) cap dung trong dan van ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc nhiet) OR (hoc thiet)) tach - ((manh trung) or (tmanh trung)) cap dung trong dan van ban*.