Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
cong tap » cuong tap, cong tac, tong tap
cong tan » cong tac, cong san, cong thanh
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 - thanh ((trung cua) OR (trung cap)) dung ((cong tap) or (cong tan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh ((trung cua) OR (trung cap)) dung ((cong tap) OR (cong tan)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh ((trung cua) OR (trung cap)) dung ((cong tap) or (cong tan)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh ((trung cua) OR (trung cap)) dung ((cong tap) or (cong tan)) toan cao*.