Perhaps you should try some spelling variations:
nhieu tang » chieu sang, hieu lang, nhiet nang
hanh tang » hanh trang, anh tang, hanh mang
chua dong » ha dong, huy dong, hoa dong
trinh han » trinh quan
chu xanh » chu manh, chieu xanh, chua xang
cua dong » cua cong, cua dang, cua nong
han cao » han cho, han gao, hoang cao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu xanh) OR (nhieu tang)) - hanh tang ((cua dong) OR (chua dong)) cong trinh han cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) or (nhieu tang)) - hanh tang ((cua dong) OR (chua dong)) cong trinh han cao~".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) or (nhieu tang)) - hanh tang ((cua dong) OR (chua dong)) cong trinh han cao*.