Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach, vu khach
cac xuc » cam xuc, cac nuoc, chat xuc
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
vi cua » vai cua, di cua
ve cac » va cac, vien cac

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 ky ((nang xa) OR (nang ma)) hoi. hieu ve cac xuc ((van hanh) or (gia thanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky ((nang xa) OR (nang ma)) hoi. hieu ve cac xuc ((van hanh) OR (gia thanh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky ((nang xa) OR (nang ma)) hoi. hieu ve cac xuc ((van hanh) or (gia thanh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ky ((nang xa) OR (nang ma)) hoi. hieu ve cac xuc ((van hanh) or (gia thanh)) vi cua tre*.