Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
trinh ve » trinh he, trinh viet, trinh van
trinh va » trinh van, trinh vat, trinh han
trinh vi » trinh viet, trinh van, trinh tai
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
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 thieu xanh - hanh ((((trinh ve) OR (trinh va))) or (trinh vi)) dung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((((trinh ve) OR (trinh va))) OR (trinh vi)) dung cong tan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh ((((trinh ve) OR (trinh va))) or (trinh vi)) dung cong tan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((((trinh ve) OR (trinh va))) or (trinh vi)) dung cong tan toan cau*.