Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hanh trinh » canh tranh, hanh chinh
hoc thien » hoc hien, hoc thieu, hoc thiet
phan dang » phan dau, phan cong, nhan dan
tran dang » tran quang, tran hoang, tranh hang
dang van » hoang van, hang va
van van » tan van, san van, van vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thien hach - hanh trinh ((phan dang) or (tran dang)) dang van van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - hanh trinh ((phan dang) OR (tran dang)) dang van van ban*.