Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tinh vai » tinh va, tinh hai, tinh bai
tu sach » thu sach, su sach, te sach
tang ma » mang may, tang van
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
va tinh » may tinh
cua tre » cua te, cuu tre, dua tren
va cam » va cham, va cac, va cao

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 y ((tang ma) or (lang xa)) hoi. hieu va cam duc va tinh vai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((tang ma) OR (lang xa)) hoi. hieu va cam duc va tinh vai ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach y ((tang ma) or (lang xa)) hoi. hieu va cam duc va tinh vai ((cua tre) or (cua triet))*.