Perhaps you should try some spelling variations:
hien tinh » khien tinh, thien tinh, bien tinh
truong va » truong dai, truong cao, truong dao
dung cong » dung trong
cong hach » cong sach, cong thanh, cong khanh
hach toan » thanh toan, manh toan
trang va » hang va
tran van » luan van
toan cau » 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 tinh - hanh ((((trang va) or (tran van))) or (truong va)) dung cong hach toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien tinh - hanh ((((trang va) OR (tran van))) OR (truong va)) dung cong hach toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien tinh - hanh ((((trang va) or (tran van))) or (truong va)) dung cong hach toan cau*.