Perhaps you should try some spelling variations:
sang tai » hang tai, sang tao, tang tai
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach, vu khach
ky sang » ky nang, ky dang, ky tang
tai hai » thi hai, dai hai, tai ha
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
sach ky » sac ky, sach y, sach ty
va hanh » va thanh, va danh, ban hanh
va dan » ca dan, va dao, va dau
vi cua » vai cua, di cua
ve cac » va cac, vien cac
cua te » cua tu

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