Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
nang tai » hang tai, tang tai, sang tai
hieu van » hieu va, thien van, lieu va
van tuan » van quan, anh tuan
cua nuoc » cua quoc, cua nguoi, cua thuoc
tu sach » su sach, te sach, tu cach
tai hoi » tai khoi, dai hoi, tai hai
van cam » van nam, van lam, van cau
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua

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)) y nang tai hoi. hieu van cam xuc ((van tuan) or (van ban)) vi cua nuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang tai hoi. hieu van cam xuc ((van tuan) OR (van ban)) vi cua nuoc.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) y nang tai hoi. hieu van cam xuc ((van tuan) or (van ban)) vi cua nuoc*.