Perhaps you should try some spelling variations:
dang xay » dang van, van xay
vu sach » vu bach, su sach, vu khach
sach ly » sach y, sach lo, sach ty
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
vi cuu » vi luu, vinh cuu

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 ly ((((nang ma) or (dang xay))) or (sang ma)) hoi. hieu va cam tuc va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ly ((((nang ma) OR (dang xay))) OR (sang ma)) hoi. hieu va cam tuc va hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ly ((((nang ma) or (dang xay))) or (sang ma)) hoi. hieu va cam tuc va hanh vi cuu tre*.