Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
canh trinh » canh tranh, hanh trinh, canh tinh
thong cong » trong cong, tong cong, thong thong
hoc thien » hoc hien, hoc thieu, hoc thiet
thanh pha » thanh phan, thanh pham, thanh pho
trinh va » trinh van, trinh vat, trinh ve
pha cau » phan cau, phap cau, pha cac
ung » cung
dung » dcung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thien thanh - canh trinh va ((ung dung) or (thong cong)) thanh pha cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien thanh - canh trinh va ((ung dung) OR (thong cong)) thanh pha cau.
• Adding a wildcard symbol may retrieve word variants: hoc thien thanh - canh trinh va ((ung dung) or (thong cong)) thanh pha cau*.