Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
cau tren » cu tren, dau tren, ca tren
hieu van » hieu va, thien van, lieu va
thu sach » thuat sach, thuoc sach, thu hoach
va thanh » gia thanh, ban thanh, va tinh
thu hang » thi hang, thuc hanh, thu huong
vai cau » va cau, van cau, vai cac
cam duc » cam xuc, cao duc, pham duc
van cam » van nam, van lam, van cau
tu sach » su sach, te sach, tu cach
tu hang » tu hanh, tu hung, ty hang

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