Perhaps you should try some spelling variations:
nhanh hai » nhanh thai, thanh hai, nhanh ha
hieu van » hieu va, thien van, lieu va
va nhanh » va thanh, va hanh, va nhan
hai cuu » hai cua, hai chu, hai cuc
cam tuc » cam xuc, cam tu, nam thuc
van cam » van nam, van lam, van cau
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, me hoi
tuc va » thuc va, truc va, tuc xa

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)) ky nang ((ma hoi) or (ma hoa)). hieu van cam tuc va nhanh hai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang ((ma hoi) OR (ma hoa)). hieu van cam tuc va nhanh hai cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang ((ma hoi) or (ma hoa)). hieu van cam tuc va nhanh hai cuu tre*.