Perhaps you should try some spelling variations:
phuong cham » phuong phap, phuong thao
thieu sach » chieu sach, thien hach, hieu cach
phuong cao » phuong thao, phuong cach, truong cao
thong dung » thong cong, thong thuong
phung cao » phung van, nhung cau, phung ho
van thanh » ban thanh, van tuan
thanh cap » thanh lap, hanh cap, than cap
dung van » duong van, dung va, dang van

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

• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sach - thanh ((((phuong cao) OR (phuong cham))) OR (phung cao)) thong dung van thanh cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu sach - thanh ((((phuong cao) OR (phuong cham))) or (phung cao)) thong dung van thanh cap~".
• Adding a wildcard symbol may retrieve word variants: toc thieu sach - thanh ((((phuong cao) OR (phuong cham))) or (phung cao)) thong dung van thanh cap*.