Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
thieu sang » chieu sang, thieu khang, thieu quang
tuan nhung » quan nhung, tuan hung, thuat nhung
hoc thieu » toc thieu, hoc hien
hanh tram » hanh tam, hanh trang, thanh tran
cong tinh » cong trinh, cong vinh, cong thanh
long tinh » trong tinh, luong tin, dong tin
toan cau » toan cao, toan ban, toan tap

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 sang - ((hanh tram) or (hanh trinh)) tuan nhung ((cong tinh) OR (long tinh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((hanh tram) OR (hanh trinh)) tuan nhung ((cong tinh) OR (long tinh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - ((hanh tram) or (hanh trinh)) tuan nhung ((cong tinh) OR (long tinh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((hanh tram) or (hanh trinh)) tuan nhung ((cong tinh) OR (long tinh)) toan cau*.