Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
truong va » truong dai, truong cao, truong dao
nang cong » nang song, dang cong, bang cong
ho chieu » theo chieu, doi chieu, mot chieu
trung va » trang va, trung ha, trung tam
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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: ((ho chieu) OR (hoc thieu)) xanh - thanh ((trung va) or (truong va)) nang cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - thanh ((trung va) OR (truong va)) nang cong dan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) xanh - thanh ((trung va) or (truong va)) nang cong dan toan tap".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) xanh - thanh ((trung va) or (truong va)) nang cong dan toan tap*.