Perhaps you should try some spelling variations:
tranh trong » tran trong, trinh trong, anh trong
thanh trong » thanh trung, hanh trong, nhanh trong
quang dung » quang trung, ung dung, cuong dung
hieu manh » chieu xanh, hieu nganh, dieu hanh
hoc hieu » hoc thieu, hoc hien, doc hieu
cong tac » cong ty
cong tan » cong san, cong thanh, cong ty
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 hieu manh - ((thanh trong) OR (tranh trong)) quang dung ((cong tac) or (cong tan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - ((thanh trong) OR (tranh trong)) quang dung ((cong tac) OR (cong tan)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - ((thanh trong) OR (tranh trong)) quang dung ((cong tac) or (cong tan)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - ((thanh trong) OR (tranh trong)) quang dung ((cong tac) or (cong tan)) toan cao*.