Perhaps you should try some spelling variations:
thuoc cong » truoc cong, thuoc trong, thu cong
hoc thuat » hoc thuyet, hoc thuc, hoc chat
cong cong » cong dong, trong cong, dung cong
ty thuoc » ly thuoc, tu thuoc, ty thuc
ban vat » bang vat, ben vat, ban va
bang va » hang va, ban va, trang va
ta hoc » tai hoc, tam hoc, te hoc

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) ta hoc thuat đe co ((ban vat) or (bang va)) ty thuoc cong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (tuyen OR quyen) ta hoc thuat đe co ((ban vat) OR (bang va)) ty thuoc cong cong.
• Adding a wildcard symbol may retrieve word variants: (tuyen or quyen) ta hoc thuat đe co ((ban vat) or (bang va)) ty thuoc cong cong*.