Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
thieu hach » thien hach, chieu sach, hieu cach
cang thang » cong thanh, dang thanh
lang thang » dang thanh, hung thang, lang trong
va phuong » va thuong, cac phuong
phan chat » phan phat, phap chat, nhan chat
cong so » cong san, cong hoa
so phan » co phan, hoc phan, hoa phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu hach - ((cang thang) or (lang thang)) va phuong cong so phan chat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu hach - ((cang thang) OR (lang thang)) va phuong cong so phan chat.
• Adding a wildcard symbol may retrieve word variants: toc thieu hach - ((cang thang) or (lang thang)) va phuong cong so phan chat*.