Perhaps you should try some spelling variations:
cham xuc » chat xuc, cham soc, pham duc
hanh tai » thanh tai, hang tai, han tai
su sach » so sach, vu sach
te sach » toc sach
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
tai va » thai va, mai va, tri va
thiet » thieu

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) or (te sach)) ky nang xa hoi. lieu va ((cham xuc) OR (cam xuc)) va hanh tai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (te sach)) ky nang xa hoi. lieu va ((cham xuc) OR (cam xuc)) va hanh tai va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (te sach)) ky nang xa hoi. lieu va ((cham xuc) OR (cam xuc)) va hanh tai va thiet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (te sach)) ky nang xa hoi. lieu va ((cham xuc) OR (cam xuc)) va hanh tai va thiet*.