Perhaps you should try some spelling variations:
thieu hach » thien hach, chieu sach, hieu cach
truong cao » truong dai
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
cong van » cong vang, cong san, song van
tan cao » toan cao, tao cao, tan ca
tay cao » tao cao, tay co, toan cao

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 hach - thanh ((trung cua) or (truong cao)) nhung cong van ((tan cao) OR (tay cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu hach - thanh ((trung cua) OR (truong cao)) nhung cong van ((tan cao) OR (tay cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu hach - thanh ((trung cua) or (truong cao)) nhung cong van ((tan cao) OR (tay cao))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu hach - thanh ((trung cua) or (truong cao)) nhung cong van ((tan cao) OR (tay cao))*.