Perhaps you should try some spelling variations:
trinh cua » tinh cua, trinh luat, trinh quan
dang cong » dung cong
ban thanh » ban hanh, ban hang
thanh cac » hanh cac, thanh bac, thanh ca
thu sang » thu san, thu bang, thu dang
thu hang » thi hang, thuc hanh, thu huong
cong ban » cong bang, cong san, cong tan

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

• Performing a fuzzy search may retrieve terms with similar spellings: chao ((thu sang) OR (thu hang)) - hanh ((trinh cua) or (tinh quang)) dang cong ban thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chao ((thu sang) OR (thu hang)) - hanh ((trinh cua) OR (tinh quang)) dang cong ban thanh cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "chao ((thu sang) OR (thu hang)) - hanh ((trinh cua) or (tinh quang)) dang cong ban thanh cac".
• Adding a wildcard symbol may retrieve word variants: chao ((thu sang) OR (thu hang)) - hanh ((trinh cua) or (tinh quang)) dang cong ban thanh cac*.