Perhaps you should try some spelling variations:
sang lap » sang tao, sang tai, dan lap
su sach » so sach, vu sach
cam tuc » cam xuc, cam tu, nam thuc
sang ma » tang ma, nang ma, sang tao
hieu ve » hieu van
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
vi cua » vai cua, di cua
dan vi » doan vi, don vi, dan va
va dan » ca dan, va dao, va dau
tuc va » thuc va, truc va, tuc xa
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: su sach ky ((sang lap) or (sang ma)) hai. ((hieu ve) OR (hieu va)) cam tuc va dan vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((sang lap) OR (sang ma)) hai. ((hieu ve) OR (hieu va)) cam tuc va dan vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((sang lap) or (sang ma)) hai. ((hieu ve) OR (hieu va)) cam tuc va dan vi cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((sang lap) or (sang ma)) hai. ((hieu ve) OR (hieu va)) cam tuc va dan vi cua te*.