Perhaps you should try some spelling variations:
mot chieu » doi chieu, ho chieu
hoc thieu » toc thieu, hoc hien
thong tac » thong cac, tuong tac, thong tai
trung va » truong va, trang va, trung ha
tran van » luan van
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((mot chieu) or (hoc thieu)) sach - thanh ((trung va) or (tran van)) thong thong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (hoc thieu)) sach - thanh ((trung va) OR (tran van)) thong thong tac toan cao.
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (hoc thieu)) sach - thanh ((trung va) or (tran van)) thong thong tac toan cao*.