Perhaps you should try some spelling variations:
tran hoang » tran hong, quan hoang, tran quang
thieu manh » tien manh, trieu minh, chieu xanh
hoang tran » hoang tuan, hoang thanh, hoang van
hieu manh » chieu xanh, hieu nganh, dieu hanh
tran lang » tran dang, tran quang, tranh hang
lang cong » dang cong, bang cong, hang cong
cong tinh » cong trinh, cong vinh, long tinh
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu manh) or (hieu manh)) - tran hoang tran lang cong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu manh) OR (hieu manh)) - tran hoang tran lang cong tinh toan cau*.