Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien danh
tranh chuc » tranh cua, trang phuc, tranh chap
tranh chua » tranh cua, trinh chuan, tranh chap
cong thanh » dong thanh, cong trinh, cong tan
thanh toan » thanh hoa, thanh san, tinh toan
thien anh » thien danh, tien anh, thien thanh
nang cong » nang song, dang cong, bang cong
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) or (thien anh)) - hanh ((tranh chuc) OR (tranh chua)) nang cong thanh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - hanh ((tranh chuc) OR (tranh chua)) nang cong thanh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (thien anh)) - hanh ((tranh chuc) OR (tranh chua)) nang cong thanh toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien anh)) - hanh ((tranh chuc) OR (tranh chua)) nang cong thanh toan cau*.