Perhaps you should try some spelling variations:
trong long » trong luong, truong long, trong cong
hanh sang » hanh san, anh sang, hanh mang
tac trong » cay trong, hoc trong
hoc kien » hoc hien, hoc vien, hoa kien
kien mac » dien mao, tien mai, kien ha
sang tac » sang tao, sang tai, sang than
long sat » cong suat, long span, luong san
nhan lap » thanh lap, nhan loai, nhan luan
phan lap » phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc kien mac - hanh sang tac trong long sat ((nhan lap) or (phan lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc kien mac - hanh sang tac trong long sat ((nhan lap) OR (phan lap))*.