Perhaps you should try some spelling variations:
dung cong » dung trong
cong cong » cong dong, trong cong, dang cong
hoc chat » hoc phat, hoc cao, hoc phan
ty thuoc » ly thuoc, tu thuoc, ty thuc
bang va » hang va, ban va, trang va
ban vat » bang vat, ben vat, ban va
tam hoc » tam hon, am hoc, tam ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: (tuyen or quyen) tam hoc chat đe co ((ban vat) or (bang va)) ty thuoc ((cong cong) OR (dung cong))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (tuyen OR quyen) tam hoc chat đe co ((ban vat) OR (bang va)) ty thuoc ((cong cong) OR (dung cong)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(tuyen or quyen) tam hoc chat đe co ((ban vat) or (bang va)) ty thuoc ((cong cong) OR (dung cong))".
• Adding a wildcard symbol may retrieve word variants: (tuyen or quyen) tam hoc chat đe co ((ban vat) or (bang va)) ty thuoc ((cong cong) OR (dung cong))*.