Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
nhung cong » dung cong, thong cong, hang cong
hoc chieu » hoc thieu, ho chieu, hoc hien
trinh han » trinh quan
trinh va » trinh van, trinh vat, trinh ve
cong san » cong tac
phan dau » phan tu, hang dau
phan van » pham van, thanh van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu tinh - canh ((trinh va) or (trinh han)) nhung cong san ((phan dau) or (phan van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu tinh - canh ((trinh va) OR (trinh han)) nhung cong san ((phan dau) OR (phan van)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu tinh - canh ((trinh va) or (trinh han)) nhung cong san ((phan dau) or (phan van))*.