Perhaps you should try some spelling variations:
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
quang hanh » quang thanh, quang khanh, quan hanh
hoc thieu » toc thieu, hoc hien
hanh dong » anh dong, ha dong
dong tinh » dong kinh, dong tin, cong tinh
toan ban » van ban
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (doi chi)) xanh - nhanh tinh quang hanh dong tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (doi chi)) xanh - nhanh tinh quang hanh dong tinh toan ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doi chi)) xanh - nhanh tinh quang hanh dong tinh toan ban*.