Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh vi » hanh vi, thanh va, thanh ve
hieu va » lieu va, hieu qua
va cham » va chat, va tham
sach ty » sach y, sach tu, sach thu
dua ban » dia ban, cua ban, qua ban
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, dua tren
vu sach » vu bach, su sach, vu khach
ma hoi » mai hoi, xa hoi, ma hoa

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 ty nang ma hoi. hieu va cham ((dua ban) or (duc tan)) thanh vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang ma hoi. hieu va cham ((dua ban) OR (duc tan)) thanh vi ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang ma hoi. hieu va cham ((dua ban) or (duc tan)) thanh vi ((cua tre) or (cua triet))*.