Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
kieu tinh » lieu tinh, trieu tinh, diep tinh
doc kieu » doc hieu, cac kieu, doc viet
trang va » hang va
tran van » luan van
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan ban, toan tap
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc kieu tinh - hanh ((trang va) or (tran van)) nhung cong tan ((toan cau) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc kieu tinh - hanh ((trang va) OR (tran van)) nhung cong tan ((toan cau) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: doc kieu tinh - hanh ((trang va) or (tran van)) nhung cong tan ((toan cau) or (phan cac))*.