Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
doc hieu » toc thieu, hoc hien
he trong » he thong, le trong, ke trong
he trung » le trung, he thong, do trung
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: ((doc hieu) or (hoc thieu)) nganh - hanh tinh ((he trong) OR (he trung)) cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc thieu)) nganh - hanh tinh ((he trong) OR (he trung)) cong dan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (hoc thieu)) nganh - hanh tinh ((he trong) OR (he trung)) cong dan toan tap".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc thieu)) nganh - hanh tinh ((he trong) OR (he trung)) cong dan toan tap*.