Perhaps you should try some spelling variations:
thien danh » thien anh, thien dang, thien thanh
hanh trinh » canh tranh, hanh chinh
thanh toan » thanh hoa, thanh san, tinh toan
hoc thien » hoc hien, hoc thieu, hoc thiet
trinh vat » trinh van, trinh luat, sinh vat
lang cong » dang cong, bang cong, hang cong
vat lang » va lang, van lang, vat mang
dan toan » van toan, dan than, manh toan

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 danh - hanh trinh vat lang cong ((dan toan) or (thanh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien danh - hanh trinh vat lang cong ((dan toan) OR (thanh toan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc thien danh - hanh trinh vat lang cong ((dan toan) or (thanh toan)) cau*.