Perhaps you should try some spelling variations:
thanh trung » thanh tung
nghien tach » nghiep cach, nghiep sach, nghiem sach
hoc nghien » hoc hien
manh trung » manh tung, manh hung, sinh trung
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 nghien tach - ((manh trung) or (thanh trung)) cap dung trong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nghien tach - ((manh trung) OR (thanh trung)) cap dung trong dan van ban.
• Adding a wildcard symbol may retrieve word variants: hoc nghien tach - ((manh trung) or (thanh trung)) cap dung trong dan van ban*.