Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang cai » nang cao, nang tai, nang cap
hanh tai » thanh tai, hang tai, han tai
cua tre » cua te, cuu tre, dua tren
va hanh » van hanh, va thanh, va danh
vu sach » vu bach, su sach, vu khach
cai hoi » cau hoi, dai hoi, cai hoa
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
ve cam » ve cham, ve cac, ve cai
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: vu sach y nang cai hoi. hieu ((ve cam) or (va cam)) luc va hanh tai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang cai hoi. hieu ((ve cam) OR (va cam)) luc va hanh tai ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: vu sach y nang cai hoi. hieu ((ve cam) or (va cam)) luc va hanh tai ((cua tre) or (cua triet))*.