Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
thanh tuong » thanh thuong, thanh tung, thanh huong
nhung huong » nhung phuong, nhung tuong, nhung cong
hieu quang » thieu quang, hieu quan, hieu qua
tuong dan » tung dan, xuong dan, truong dai
dan nhung » ban nhung, dap nhung, san nhung
dan phan » doan phan, dan chan, van phan
phan cau » phan dau, phan cac, phan tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu quang) or (thieu khang)) - thanh tuong dan nhung huong dan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu quang) OR (thieu khang)) - thanh tuong dan nhung huong dan phan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu quang) or (thieu khang)) - thanh tuong dan nhung huong dan phan cau*.