Perhaps you should try some spelling variations:
ngang quang » nang quan, nhanh quang, dang quang
hanh trinh » canh tranh, hanh chinh
thieu xanh » chieu xanh, thien anh, thien danh
cong ngang » cong nhan, cong quang, cong lang
hieu manh » chieu xanh, hieu nganh, dieu hanh
vat nhung » vap nhung, vai nhung, ve nhung
quang cao » nang cao, quang nam, quang cua

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