Perhaps you should try some spelling variations:
hoc thieu » hoc hien
trinh van » trinh quan, trinh toan, dinh van
trinh han » trinh quan
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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) or (toc thieu)) xanh - hanh ((trinh van) or (trinh han)) dung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) xanh - hanh ((trinh van) OR (trinh han)) dung cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (toc thieu)) xanh - hanh ((trinh van) or (trinh han)) dung cong dan toan cao*.