Perhaps you should try some spelling variations:
hoc chinh » hoan chinh, hoc sinh
mang cong » dang cong, bang cong, hang cong
hoc kinh » hoc sinh, luoc kinh
qua mang » cua mang, qua hang, qua nang
cong tac » cong ty
tac phat » tac pham, tam phat, tan phat
phat cau » phan cau, pha cau, phap cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chinh) OR (hoc kinh)) sach - ((canh tranh) or (hanh chinh)) qua mang cong tac phat cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chinh) OR (hoc kinh)) sach - ((canh tranh) OR (hanh chinh)) qua mang cong tac phat cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chinh) OR (hoc kinh)) sach - ((canh tranh) or (hanh chinh)) qua mang cong tac phat cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc chinh) OR (hoc kinh)) sach - ((canh tranh) or (hanh chinh)) qua mang cong tac phat cau*.