Perhaps you should try some spelling variations:
hoc treng » hoc tieng, hoc trong, hoc trung
dung cong » dung trong
hoc tren » moc tren, hoc truyen, thuoc tren
anh tang » anh bang, anh dang, anh nang
tang qua » tang quan, tang cua, tang quy
qua dung » quang dung, su dung, qua song
cong tac » cong ty
toan cao » toan tap
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 tren) or (hoc treng)) manh - anh tang qua dung cong tac ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc tren) OR (hoc treng)) manh - anh tang qua dung cong tac ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ((hoc tren) or (hoc treng)) manh - anh tang qua dung cong tac ((toan cao) or (toan ban))*.