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 » hieu va, thien van, lieu va
thu sach » thuoc sach, thu hoach, khau sach
van cam » van nam, van lam, van cau
cam luc » cam xuc, cau luc
vai dau » va dau, van dau, xvii dau
tu sach » su sach, te sach, tu cach
luc va » duc va, tuc va, loc va
x hoi » xa hoi, o hoi, x ho

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