Perhaps you should try some spelling variations:
trong trong » trong truong, truong trong, thong trong
trong thi » trong thoi, trong thu, trong tho
tinh thai » sinh thai, tinh toan, tinh chat
thai doan » chan doan, tap doan, giai doan
hieu luat » hieu qua
doan van » doan va, hoang van, luan van
van hieu » cao hieu
thi van » thi lan, thi hanh, thi nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tin dung trong trong thi van ) or ( tinh thai doan van hieu luat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung trong trong thi van ) OR ( tinh thai doan van hieu luat ))*.