Perhaps you should try some spelling variations:
trinh vatn » trinh van, trinh han, trinh san
thong cong » trong cong, tong cong, thong thong
dieu tinh » diep tinh, lieu tinh, dien tinh
trinh vat » trinh van, trinh luat, sinh vat
cong van » cong vang, cong san, song van
so dieu » bo dieu, hoc dieu
tan cao » toan cao, tao cao, tan ca
tay cao » tao cao, tay co, toan cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: so dieu tinh - canh ((trinh vat) or (trinh vatn)) thong cong van ((tan cao) or (tay cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so dieu tinh - canh ((trinh vat) OR (trinh vatn)) thong cong van ((tan cao) OR (tay cao)).
• Adding a wildcard symbol may retrieve word variants: so dieu tinh - canh ((trinh vat) or (trinh vatn)) thong cong van ((tan cao) or (tay cao))*.