Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
thanh tung » thanh cong
nhung dung » phuong dung, ung dung, thong dung
hoc thieu » toc thieu, hoc hien
dung manh » duong manh, dung danh, hung manh
manh toan » thanh toan, anh tuan, tinh toan
toan cau » 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 khang - ((thanh trung) OR (thanh tung)) va nhung dung manh toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu khang - ((thanh trung) OR (thanh tung)) va nhung dung manh toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu khang - ((thanh trung) OR (thanh tung)) va nhung dung manh toan cau*.