Perhaps you should try some spelling variations:
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
phuong dan » phuong danh, phuong doan, huong dan
ho chieu » theo chieu, hoc thieu, doi chieu
tinh cua » trinh cua, sinh cua, tinh chat
cua bang » chua bang, cua ban, cua dang
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban
doi chi » doi khi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chi)) xanh - nhanh tinh cua bang phuong dan ((toan tai) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chi)) xanh - nhanh tinh cua bang phuong dan ((toan tai) or (toan ban))*.