Perhaps you should try some spelling variations:
nhanh hai » nhanh thai, thanh hai, nhanh ha
nang dau » hang dau, xang dau, nang du
va nhanh » va thanh, va hanh, va nhan
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
cua tre » cuu tre, cua triet, dua tren
dau ha » dam ha, dau va, cau ha
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang dau ha. hieu va pham duc va nhanh hai ((cua tre) or (((cua te) OR (cua tu))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang dau ha. hieu va pham duc va nhanh hai ((cua tre) OR (((cua te) OR (cua tu)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang dau ha. hieu va pham duc va nhanh hai ((cua tre) or (((cua te) OR (cua tu))))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang dau ha. hieu va pham duc va nhanh hai ((cua tre) or (((cua te) OR (cua tu))))*.