Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
cong vang » cong lang, cong quang, cong ngang
vang toan » van toan, dang toan, quang toan
hoc hieu » hoc hien, doc hieu, hoc dieu
bang vat » bang va, cang vat, hang va
dang vat » dang van, dong vat, dang nhat
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hieu) or (hoc thieu)) cach - thanh ((bang vat) or (dang vat)) dung cong vang toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc thieu)) cach - thanh ((bang vat) OR (dang vat)) dung cong vang toan ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (hoc thieu)) cach - thanh ((bang vat) or (dang vat)) dung cong vang toan ban*.