Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
canh trinh » canh tranh, hanh trinh, canh tinh
toc chieu » toc thieu, doc hieu, hoc thieu
trinh su » trinh tu, trinh san, trinh cau
than cap » khan cap, thanh lap, thanh cac
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc chieu tinh - canh trinh su ((dung cong) OR (dung trong)) tan ((than cap) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc chieu tinh - canh trinh su ((dung cong) OR (dung trong)) tan ((than cap) OR (phan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc chieu tinh - canh trinh su ((dung cong) OR (dung trong)) tan ((than cap) or (phan cau))".
• Adding a wildcard symbol may retrieve word variants: toc chieu tinh - canh trinh su ((dung cong) OR (dung trong)) tan ((than cap) or (phan cau))*.