Perhaps you should try some spelling variations:
thuong gian » truong giang, phuong giang, khong gian
dinh thuong » dinh huong, dinh duong, dinh cuong
doc hieu » hoc thieu, hoc hien
gian van » giang van, gian dan, gian lan
van dung » van dong, xay dung, tin dung
dung php » dung phu, dung phan, dung phat
php phan » phap phan, phe phan, phi phan
phan lap » phan dau

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 (toc thieu)) sang - dinh thuong gian van dung php phan lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) OR (toc thieu)) sang - dinh thuong gian van dung php phan lap".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) OR (toc thieu)) sang - dinh thuong gian van dung php phan lap*.