Perhaps you should try some spelling variations:
trinh vatn » trinh van, trinh han, trinh san
nhung cong » dung cong, thong cong, hang cong
trinh vat » trinh van, trinh luat, sinh vat
dan chinh » dang chinh, lan chinh, van chinh
chinh cau » chinh chau, chinh ca, chinh can
hoc dien » hoc hien, hoc vien, hoc dieu
dien dan » hien dai, vien dai, gian dan
cong dan » cong san, cong tan, huong dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc dien dan - hanh ((trinh vat) or (trinh vatn)) nhung cong dan chinh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dien dan - hanh ((trinh vat) OR (trinh vatn)) nhung cong dan chinh cau.
• Adding a wildcard symbol may retrieve word variants: hoc dien dan - hanh ((trinh vat) or (trinh vatn)) nhung cong dan chinh cau*.