Perhaps you should try some spelling variations:
thang long » thanh cong
hien manh » hien hanh, tien manh, hieu manh
trinh van » trinh han, trinh quan, trinh toan
trinh va » trinh vat, trinh ve, trinh vi
long dan » long doan, cong dan, nong dan
dan phan » doan phan, dan chan, van phan
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 hien manh - canh ((trinh va) or (trinh van)) thang long dan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien manh - canh ((trinh va) OR (trinh van)) thang long dan phan dau*.