Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh trinh » canh tranh, hanh chinh
sang ngang » sang nhung, dang nganh
cong ngang » cong nhan, cong quang, cong lang
hoc thieu » toc thieu, hoc hien
trinh van » trinh han, trinh quan, trinh toan
ban cong » bang cong, van cong, phan cong

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - hanh trinh van ban cong ((sang ngang) OR (cong ngang)) cao~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh trinh van ban cong ((sang ngang) OR (cong ngang)) cao*.