Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thai cua » than cua, tai cuc, tri cua
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cac luc » cau luc, coc luc, cac nuoc
va hanh » van hanh, va thanh, va danh
tai cua » tai cuc, tri cua, dai cua
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thuat sach)) ky nang xa hoi. hieu va cac luc va hanh ((tai cua) OR (thai cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) ky nang xa hoi. hieu va cac luc va hanh ((tai cua) OR (thai cua)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thuat sach)) ky nang xa hoi. hieu va cac luc va hanh ((tai cua) OR (thai cua)) tu".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) ky nang xa hoi. hieu va cac luc va hanh ((tai cua) OR (thai cua)) tu*.