Perhaps you should try some spelling variations:
tranh hang » trinh han, tran hoang, tran hong
hoc thieu » toc thieu
hang khoa » dung khoa
khoa hang » khoa dang, khoai lang, kho tang
cong can » cong san, cong tan, cong cau
cong dan » cong san, cong tan, huong dan
chan cau » phan cau, can cau, chinh cau

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) or (hoc hien)) xanh - tranh hang khoa hang ((cong can) OR (cong dan)) chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (hoc hien)) xanh - tranh hang khoa hang ((cong can) OR (cong dan)) chan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (hoc hien)) xanh - tranh hang khoa hang ((cong can) OR (cong dan)) chan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (hoc hien)) xanh - tranh hang khoa hang ((cong can) OR (cong dan)) chan cau*.