Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
va thanh » gia thanh, va tinh, le thanh
vu sach » vu bach, su sach, vu khach
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu van
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
cam luc » cam xuc, cau luc
vi cua » vai cua, di cua
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 tang xa hoi. ((hieu ve) or (hieu va)) cam luc ((va thanh) OR (ban thanh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky tang xa hoi. ((hieu ve) OR (hieu va)) cam luc ((va thanh) OR (ban thanh)) vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky tang xa hoi. ((hieu ve) or (hieu va)) cam luc ((va thanh) OR (ban thanh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: vu sach ky tang xa hoi. ((hieu ve) or (hieu va)) cam luc ((va thanh) OR (ban thanh)) vi cua te*.