Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh vai » thanh hai, thanh van, thanh tai
dau tren » dau tien, dat tren, dau tieng
va thanh » gia thanh, ban thanh, va tinh
hieu van » thien van, lieu va, hieu ve
cam luc » cam xuc, cau luc
vai dau » va dau, van dau, xvii dau
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
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 van) OR (hieu va)) cam luc va thanh vai dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) ky nang xa hoi. ((hieu van) OR (hieu va)) cam luc va thanh vai dau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thuat sach)) ky nang xa hoi. ((hieu van) OR (hieu va)) cam luc va thanh vai dau tren".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) ky nang xa hoi. ((hieu van) OR (hieu va)) cam luc va thanh vai dau tren*.