Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, khau sach
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
thanh va » thanh van, hanh va, thanh ha
cau tren » cu tren, dau tren, ca tren
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
va cau » van cau, va cac, va dau

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 (thu hoach)) ky nang xa hoi. hieu van cam duc va thanh va cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (thu sach))) OR (thu hoach)) ky nang xa hoi. hieu van cam duc va thanh va cau tren.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (thu sach))) or (thu hoach)) ky nang xa hoi. hieu van cam duc va thanh va cau tren*.