Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va tinh » may tinh
sach ty » sach y, sach tu, sach thu
cam tuc » cam xuc, cam tu, nam thuc
sang ma » tang ma, nang ma, sang tao
tuc va » thuc va, truc va, tuc xa
ve cam » ve cham, ve cac, va cam
vi ve » va ve, gi ve, vi he
ve ve » de ve, va ve, ke ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty ((nang xa) or (sang ma)) hoi. hieu ve cam tuc va tinh ((vi ve) or (ve ve)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((nang xa) OR (sang ma)) hoi. hieu ve cam tuc va tinh ((vi ve) OR (ve ve)) triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((nang xa) or (sang ma)) hoi. hieu ve cam tuc va tinh ((vi ve) or (ve ve)) triet*.