Perhaps you should try some spelling variations:
thieu manh » hieu manh, tien manh, trieu minh
hoc thieu » toc thieu, hoc hien
cong vang » cong lang, cong quang, cong ngang
vang phan » van phan, nang phan, quang phan
cua dung » cua dong, qua dung, cua rung
cua dang » cua cong, cua ban
phan dau » phan tu, hang 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 thieu manh - cach mang ((cua dung) or (cua dang)) cong vang phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu manh - cach mang ((cua dung) OR (cua dang)) cong vang phan dau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu manh - cach mang ((cua dung) or (cua dang)) cong vang phan dau*.