Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
thiet anh » thien anh, thuyet anh, thien danh
trinh vat » trinh van, trinh luat, sinh vat
cong dan » cong san, cong tan, huong dan
than cap » khan cap, thanh lap, thanh cac
phan cac » nhan cach, phan dau, phan lap
tinh va » tich va, trinh van, tinh gia

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet anh - hanh ((tinh va) OR (trinh vat)) nhung cong dan ((than cap) OR (phan cac))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet anh - hanh ((tinh va) OR (trinh vat)) nhung cong dan ((than cap) or (phan cac))~".
• Adding a wildcard symbol may retrieve word variants: hoc thiet anh - hanh ((tinh va) OR (trinh vat)) nhung cong dan ((than cap) or (phan cac))*.