Perhaps you should try some spelling variations:
tao nganh » tao nhan, cac nganh, da nganh
nganh cau » nganh dau, nhanh cau, nganh mac
sach tao » sach dao, sach bao, sach tai
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach, vu khach
cua tre » cua te, cua triet, dua tren
hanh va » hang va, hanh vi
xuc van » duc van, luc van, vuc van
hieu va » lieu va
cuu tre » cau tren, cau treo

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 tao nganh cau hoi. ((hieu va) or (hieu qua)) cam xuc van hanh va ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach tao nganh cau hoi. ((hieu va) OR (hieu qua)) cam xuc van hanh va ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: vu sach tao nganh cau hoi. ((hieu va) or (hieu qua)) cam xuc van hanh va ((cua tre) or (cuu tre))*.