Perhaps you should try some spelling variations:
phong thanh » phan thanh, dong thanh, cong thanh
thieu sang » chieu sang, thieu khang, thieu quang
hanh tranh » canh tranh, hanh trinh, hanh trang
thanh toan » thanh hoa, thanh san, tinh toan
hoc thieu » toc thieu, hoc hien
cua tong » cua cong, cua nong, cua song
cua dong » chua dong, cua cong, cua dang
toan tap » toan ban

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 tranh ((cua tong) OR (cua dong)) phong thanh toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - hanh tranh ((cua tong) OR (cua dong)) phong thanh toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh tranh ((cua tong) OR (cua dong)) phong thanh toan tap*.