Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
manh tung » manh hung, thanh tung
hoc hieu » hoc hien, doc hieu, hoc dieu
tung chu » hung chu, luong chu, cung chua
chu bang » thu bang, chuc nang, chu quang
cong tan » cong tac, cong san, cong 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 hieu) OR (hoc thieu)) cach - manh tung chu bang ((cong tan) or (huong dan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc thieu)) cach - manh tung chu bang ((cong tan) OR (huong dan)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) OR (hoc thieu)) cach - manh tung chu bang ((cong tan) or (huong dan)) toan cao".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) OR (hoc thieu)) cach - manh tung chu bang ((cong tan) or (huong dan)) toan cao*.