Perhaps you should try some spelling variations:
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
thi nhanh » chi nhanh, thi thanh, thi khanh
cau tren » cu tren, dau tren, ca tren
sach thi » sach thu, sach tai, sach thieu
thi hanh » thi thanh
cau theo » cau thi, cau tao
tinh loc » tinh hoc, minh loc, tinh soc
cua tre » cua te, cuu tre, cua triet
danh du » danh dau, danh tu, dinh du
tu sach » thu sach, su sach, te sach
hanh xa » hanh va, hanh ma, hanh xu
va danh » va dinh, va dan, va hanh
loc va » hoc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach thi hanh xa hoi. thi nhanh tinh loc va danh du ((cua tre) or (((cau theo) or (cau tren))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thi hanh xa hoi. thi nhanh tinh loc va danh du ((cua tre) OR (((cau theo) OR (cau tren)))).
• Adding a wildcard symbol may retrieve word variants: tu sach thi hanh xa hoi. thi nhanh tinh loc va danh du ((cua tre) or (((cau theo) or (cau tren))))*.