Perhaps you should try some spelling variations:
dua tren » dung tren
tu sach » thu sach, su sach, te sach
sach xa » sach dao, sach nha, sach bai
xa nang » da nang, va nang, xa nong
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
xa hanh » xa thanh, xa khanh, va hanh
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao
xuc xa » tuc xa, buc 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 xa nang ma hoi. hieu va cam xuc xa hanh vi ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach xa nang ma hoi. hieu va cam xuc xa hanh vi ((dua tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach xa nang ma hoi. hieu va cam xuc xa hanh vi ((dua tren) or (cuu tre))*.