Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, thien anh, thien danh
hieu manh » chieu xanh, hieu nganh, dieu hanh
bang song » nang song
hanh han » hanh nhan, hanh phan, hanh san
song dan » song danh, song van, cong dan
than cao » toan cao, thai cao, than cap
khan cap » khan ap, than cap, khoan cam
va bang » va nang, va lang, va ban
han va » hang va, hanh va, nhan va

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 (hieu manh)) - hanh han va bang song dan ((than cao) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - hanh han va bang song dan ((than cao) OR (khan cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - hanh han va bang song dan ((than cao) or (khan cap))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - hanh han va bang song dan ((than cao) or (khan cap))*.