Perhaps you should try some spelling variations:
phuong cham » phuong phap, phuong thao
thong cong » trong cong, tong cong, thong thong
toc hieu » toc thieu, doc hieu, hoc thieu
cong dat » cong dan, dong dat, cong da
dat khan » dat khanh, dat thanh, bat khanh
khan cap » khan ap, than cap, khoan cam
hieu va » lieu va, hieu qua

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc hieu va - thanh ((phuong cham) or (phung van)) thong cong dat khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu va - thanh ((phuong cham) OR (phung van)) thong cong dat khan cap*.