Perhaps you should try some spelling variations:
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
doc hieu » toc thieu, hoc thieu, hoc hien
tung cam » trung cap, tung pham, duong cam
dung cam » dung lam, dung cac, dung nam
cong san » cong tac
san chan » san chang, dan chan, san chay
chan cau » phan cau, can cau, chinh cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (doc hieu)) sach - thanh ((tung cam) OR (dung cam)) dung cong san chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doc hieu)) sach - thanh ((tung cam) OR (dung cam)) dung cong san chan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doc hieu)) sach - thanh ((tung cam) OR (dung cam)) dung cong san chan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doc hieu)) sach - thanh ((tung cam) OR (dung cam)) dung cong san chan cau*.