Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
trinh vat » trinh van, trinh luat, sinh vat
vat thong » va thong, vat trong, mat thong
van tuan » van quan, van ban
van tai » von tai

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 - hanh trinh vat thong cong ((van tai) or (((van tuan) OR (anh tuan)))) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh trinh vat thong cong ((van tai) OR (((van tuan) OR (anh tuan)))) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh trinh vat thong cong ((van tai) or (((van tuan) OR (anh tuan)))) cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh trinh vat thong cong ((van tai) or (((van tuan) OR (anh tuan)))) cao*.