Perhaps you should try some spelling variations:
cau theo » cau thi, cau tao
hanh tai » thanh tai, hang tai, han tai
cam duc » cam xuc, cao duc, pham duc
cuu tre » cua tre, cau tren, cau treo
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, te sach, tu cach
hieu ve » hieu va, hieu van
cao hoi » cau hoi, co hoi, cao hoc
su sach » so sach, vu sach
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam

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)) y nang cao hoi. hieu ve cam duc va hanh tai ((cuu tre) or (cau theo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) y nang cao hoi. hieu ve cam duc va hanh tai ((cuu tre) OR (cau theo)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) y nang cao hoi. hieu ve cam duc va hanh tai ((cuu tre) or (cau theo))*.