Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
nam thuc » nam thuoc, am thuc, nam thu
va thanh » ban thanh, va tinh, le thanh
va trien » va truyen, va thiet, va tuyen
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
nam tuc » nam truc, nam tu, nam thuoc
pho va » phoi va, pho ha, pho da

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ky lang xa hoi. lieu va ((nam tuc) or (nam thuc)) ((va thanh) OR (gia thanh)) pho va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky lang xa hoi. lieu va ((nam tuc) OR (nam thuc)) ((va thanh) OR (gia thanh)) pho va trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky lang xa hoi. lieu va ((nam tuc) or (nam thuc)) ((va thanh) OR (gia thanh)) pho va trien".
• Adding a wildcard symbol may retrieve word variants: hoc sach ky lang xa hoi. lieu va ((nam tuc) or (nam thuc)) ((va thanh) OR (gia thanh)) pho va trien*.