Perhaps you should try some spelling variations:
tinh thai » sinh thai, tinh toan, tinh chat
cham duc » pham duc, cham soc, pham duy
tu sach » thu sach, te sach, tu cach
va cham » va chat, va tham
cua tre » cuu tre, cua triet, dua tren
va tinh » may tinh
hieu va » lieu va, hieu qua
hang xa » hoang xa, hang va, hang ca
tu hang » thu hang, tu hanh, tu hung
su sach » so sach, vu sach
cua te » cua tu

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) or (su sach)) tu hang xa hoi. hieu va cham duc va tinh thai ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) tu hang xa hoi. hieu va cham duc va tinh thai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) tu hang xa hoi. hieu va cham duc va tinh thai ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) tu hang xa hoi. hieu va cham duc va tinh thai ((cua tre) OR (cua te))*.