Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
va hanh » van hanh, va thanh, va danh
cac xuc » cam xuc, cac nuoc, chat xuc
sach ky » sac ky, sach y, sach ty
luu tre » luu tru, cuu tre, luy tre
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
vi luu » vi lua
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 ma) or (nang x)) hoi. hieu ve cac xuc ((va hanh) or (gia thanh)) vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky ((nang ma) OR (nang x)) hoi. hieu ve cac xuc ((va hanh) OR (gia thanh)) vi luu tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ky ((nang ma) or (nang x)) hoi. hieu ve cac xuc ((va hanh) or (gia thanh)) vi luu tre*.