Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
phan duc » pham duc, phan tu, phan dau
cuu tre » cua tre, cau treo
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
hung xa » chung xa, huong xa, hung ha
tu hung » tu chung, tu nhung, tu vung
ve phan » va phan, ke phan, ve phat

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (hoc cao)) tu hung xa hoi. hieu ve phan duc va hanh va ((cuu tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (hoc cao)) tu hung xa hoi. hieu ve phan duc va hanh va ((cuu tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (hoc cao)) tu hung xa hoi. hieu ve phan duc va hanh va ((cuu tre) or (cau tren))*.