Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
dau treo » dau tren, cau treo, dau theo
van hanh » van thanh, ban hanh, van anh
hieu va » lieu va, hieu qua
hanh va » hang va, hanh vi
xuc van » duc van, luc van, xuc ban
tu sach » thu sach, su sach, te sach
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
va dau » va dao

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