Perhaps you should try some spelling variations:
thien anh » thien danh, tien anh, thien thanh
hua khong » cua khong, hoac khong, phuc khong
hoa khong » khoi khong, hoa cong, he khong
hien anh » hien hanh, dien anh, tien anh
dung van » duong van, dung va, dang van
van toan » van tuan, van tan, van thanh
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 ((hien anh) or (thien anh)) - canh tranh ((hua khong) or (hoa khong)) dung van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien anh) OR (thien anh)) - canh tranh ((hua khong) OR (hoa khong)) dung van toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien anh) or (thien anh)) - canh tranh ((hua khong) or (hoa khong)) dung van toan cao*.