Perhaps you should try some spelling variations:
thanh trung » thanh tung
phuong danh » phuong anh, phuong dinh, phuong hanh
phuong dan » phuong doan, huong dan, phuong lan
chi thanh » chi nhanh, thi thanh, cho thanh
trung cua » truong cua, trung tuan, trung cap
cua dung » cua dang, cua dong, qua dung
chan ban » chat ban, chan nan, chan doan
hoc chi » hoc chia, hoc cho, hoc chu
can ban » van ban, toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chi thanh - thanh trung cua dung ((phuong dan) or (phuong danh)) ((chan ban) OR (can ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chi thanh - thanh trung cua dung ((phuong dan) OR (phuong danh)) ((chan ban) OR (can ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chi thanh - thanh trung cua dung ((phuong dan) or (phuong danh)) ((chan ban) OR (can ban))".
• Adding a wildcard symbol may retrieve word variants: hoc chi thanh - thanh trung cua dung ((phuong dan) or (phuong danh)) ((chan ban) OR (can ban))*.