Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va hang » van hang, va nang, va lang
doi cua » dai cua, hoi cua, dong cua
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
di cua » dai cua, de cua, do cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (su sach)) ky nang xa hoi. hieu ve cam xuc va hang ((di cua) OR (doi cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (su sach)) ky nang xa hoi. hieu ve cam xuc va hang ((di cua) OR (doi cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (su sach)) ky nang xa hoi. hieu ve cam xuc va hang ((di cua) OR (doi cua)) triet".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (su sach)) ky nang xa hoi. hieu ve cam xuc va hang ((di cua) OR (doi cua)) triet*.