Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien hanh » dieu hanh
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
tuong dan » huong dan, tung dan, truong dai
xuong dan » huong dan, xuong san, nguong dan
dung dan » dung dat, dung san, tung dan
can cau » van cau, ban cau, ca cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien hanh - thanh trung cua thong ((((tuong dan) or (dung dan))) or (xuong dan)) can cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - thanh trung cua thong ((((tuong dan) OR (dung dan))) OR (xuong dan)) can cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - thanh trung cua thong ((((tuong dan) or (dung dan))) or (xuong dan)) can cau*.