Perhaps you should try some spelling variations:
te sach » toc sach
hoi cua » hoi chuc
va tinh » may tinh
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach 2
va cam » va cham, va cac, va cao
ma hoi » mai hoi, xa hoi, me hoi
v nang » va nang, vu nang, van nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach v nang ((ma hoi) OR (ma hoa)). hieu va cam tuc ((va tinh) or (gia thanh)) hoi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang ((ma hoi) OR (ma hoa)). hieu va cam tuc ((va tinh) OR (gia thanh)) hoi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v nang ((ma hoi) OR (ma hoa)). hieu va cam tuc ((va tinh) or (gia thanh)) hoi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach v nang ((ma hoi) OR (ma hoa)). hieu va cam tuc ((va tinh) or (gia thanh)) hoi cua tre*.