Perhaps you should try some spelling variations:
hanh thong » hanh trong, hang thong, hinh thong
hoc thieu » toc thieu
anh thong » anh thuong, anh trong, anh huong
nang cong » nang song, dang cong, bang cong
van nang » van quang, van ban, van dong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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 (hoc hien)) tinh - ((hanh thong) OR (anh thong)) van nang cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (hoc hien)) tinh - ((hanh thong) OR (anh thong)) van nang cong dan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (hoc hien)) tinh - ((hanh thong) OR (anh thong)) van nang cong dan toan tap".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (hoc hien)) tinh - ((hanh thong) OR (anh thong)) van nang cong dan toan tap*.