Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
nang ma » tang ma, sang ma, nang cao
xuc van » duc van, luc van, xuc ban
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, mang xa
sach v » sach va, sach y, sach 2
va cam » va cham, va cac, va cao
vi su » ve su, ki su, oi su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach v ((nang xa) or (nang ma)) hoi. hieu va cam xuc van hanh ((vi su) OR (va su)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach v ((nang xa) OR (nang ma)) hoi. hieu va cam xuc van hanh ((vi su) OR (va su)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach v ((nang xa) or (nang ma)) hoi. hieu va cam xuc van hanh ((vi su) OR (va su)) viet".
• Adding a wildcard symbol may retrieve word variants: tu sach v ((nang xa) or (nang ma)) hoi. hieu va cam xuc van hanh ((vi su) OR (va su)) viet*.