Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
thanh toan » thanh hoa, thanh san, tinh toan
hoc thieu » toc thieu, hoc hien
trung dai » truong dai, truong dao, trung tam
manh toan » anh tuan, tinh toan
trung di » trung du, trung do, trung vi
ung cong » dung cong, luong cong, duong cong

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 khang - hanh ((trung di) OR (trung dai)) ung cong ((manh toan) or (thanh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu khang - hanh ((trung di) OR (trung dai)) ung cong ((manh toan) OR (thanh toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu khang - hanh ((trung di) OR (trung dai)) ung cong ((manh toan) or (thanh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu khang - hanh ((trung di) OR (trung dai)) ung cong ((manh toan) or (thanh toan)) cau*.