Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trung » thanh trung, hanh trang, manh trung
trinh toan » tinh toan, thanh toan, trinh han
hoc thieu » toc thieu, hoc hien
hua khong » cua khong, hoac khong, phuc khong
hoa khong » khoi khong, hoa cong, he khong
cua dong » chua dong, cua cong, cua dang
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 xanh - hanh trung ((cua dong) or (((hua khong) OR (hoa khong)))) cong trinh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh trung ((cua dong) OR (((hua khong) OR (hoa khong)))) cong trinh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh trung ((cua dong) or (((hua khong) OR (hoa khong)))) cong trinh toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh trung ((cua dong) or (((hua khong) OR (hoa khong)))) cong trinh toan cao*.