Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
hoc thieu » toc thieu, hoc hien
thang cua » thong cua, hang cua, than cua
dung cong » dung trong
khang cu » khung cua, chung cu, hang ca
khan cua » nhan cua, than cua, han cua
cong tac » cong ty
tac nhan » tao nhan, cac nhan, dac nhan
nhan cao » nha cao, nhan tao, nhan co

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 tinh - hanh ((((khang cu) OR (thang cua))) or (khan cua)) dung cong tac nhan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - hanh ((((khang cu) OR (thang cua))) OR (khan cua)) dung cong tac nhan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tinh - hanh ((((khang cu) OR (thang cua))) or (khan cua)) dung cong tac nhan cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - hanh ((((khang cu) OR (thang cua))) or (khan cua)) dung cong tac nhan cao*.