Perhaps you should try some spelling variations:
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 luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
sang ma » tang ma, sang tao, mang may
lang xa » lang ha, dang xay, lang van
nang ma » tang ma, nang cao, mang may
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua

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