Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
tru nang » tra nang, tri nang, truc nano
hieu van » hieu va, thien van, lieu va
ban hang » ngan hang
tu sach » su sach, te sach, tu cach
van cam » van nam, van lam, van cau
cam cua » ca cua, nam cua, cau cua
hang vi » hang va, hanh vi, hang di
cua tre » cua te, cuu tre, cua triet
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)) ((tru nang) or (ky nang)) xa hoi. hieu van cam cua ban hang vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ((tru nang) OR (ky nang)) xa hoi. hieu van cam cua ban hang vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ((tru nang) or (ky nang)) xa hoi. hieu van cam cua ban hang vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ((tru nang) or (ky nang)) xa hoi. hieu van cam cua ban hang vi cua tre*.