Perhaps you should try some spelling variations:
trinh luan » trinh luat, trinh quan, trinh han
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
trinh cua » trinh luat, trinh quan, trinh chat
hoc hieu » hoc thieu, hoc hien, doc hieu
tinh cua » sinh cua, tinh chat, tranh cua
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - hanh ((((trinh cua) OR (trinh luan))) or (tinh cua)) nhung cong tan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh ((((trinh cua) OR (trinh luan))) OR (tinh cua)) nhung cong tan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - hanh ((((trinh cua) OR (trinh luan))) or (tinh cua)) nhung cong tan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh ((((trinh cua) OR (trinh luan))) or (tinh cua)) nhung cong tan than cau*.