Perhaps you should try some spelling variations:
trinh tinh » trinh kinh, trinh tin, trinh dinh
thong cong » trong cong, tong cong, thong thong
doi trinh » doc trinh, doi tinh, dong trinh
trang cua » tranh cua, tang cua, trung cua
tran chau » tranh chap, tran huu
mang cua » manh cua, dung cua, ban cua
cong tac » cong ty
tra cau » tra sau, ta cau, tra cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi trinh tinh - hanh ((trang cua) or (mang cua)) thong cong tac ((tra cau) or (tran chau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi trinh tinh - hanh ((trang cua) OR (mang cua)) thong cong tac ((tra cau) OR (tran chau)).
• Adding a wildcard symbol may retrieve word variants: doi trinh tinh - hanh ((trang cua) or (mang cua)) thong cong tac ((tra cau) or (tran chau))*.