Perhaps you should try some spelling variations:
khien tinh » thien tinh, khien thich, bien tinh
hanh trung » thanh trung, hanh trang, manh trung
trung tuan » trung thanh, trung tam, tran tuan
hoc khien » hoc hien, hoc nghien, hoc thieu
tuan cong » thuan cong, luan cong, tran cong
cong tinh » cong trinh, long tinh, cong thanh
cong vinh » cong trinh, trong vinh, cong viec

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc khien tinh - hanh trung tuan cong ((cong tinh) OR (cong vinh)) ((van ban) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc khien tinh - hanh trung tuan cong ((cong tinh) OR (cong vinh)) ((van ban) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc khien tinh - hanh trung tuan cong ((cong tinh) OR (cong vinh)) ((van ban) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc khien tinh - hanh trung tuan cong ((cong tinh) OR (cong vinh)) ((van ban) or (toan ban))*.