Perhaps you should try some spelling variations:
phuong cham » phuong phap, phuong thao
tan phuong » tran phuong, tai phuong, van phuong
hoc thieu » toc thieu, hoc hien
bang cong » dang cong, bang song, hang cong
doc hieu » toc thieu, hoc hien
tung dap » trung dai, tuong dan, tuong dao
tung dan » dung dan, huong dan, trung dai
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) OR (hoc thieu)) manh - thanh ((tung dap) or (tung dan)) bang cong tan phuong cham~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc thieu)) manh - thanh ((tung dap) OR (tung dan)) bang cong tan phuong cham.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) OR (hoc thieu)) manh - thanh ((tung dap) or (tung dan)) bang cong tan phuong cham".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) OR (hoc thieu)) manh - thanh ((tung dap) or (tung dan)) bang cong tan phuong cham*.