Perhaps you should try some spelling variations:
hang tai » hang va, dung tai
tu sach » thu sach, su sach, te sach
ve cham » va cham, ve chat, vu cham
hang di » hang doi, hang vi, hang dien
va hang » van hang, va nang, va lang
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
tai hoi » tai khoi, dai hoi, tai hai
ky hang » ky nang, ly hang, ky dang
di cua » dai cua, doi cua, de cua
va cai » va cac, va bai, va dai

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 hoach)) ky hang tai hoi. hieu ((va cai) or (ve cham)) thuc va hang di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) ky hang tai hoi. hieu ((va cai) OR (ve cham)) thuc va hang di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu hoach)) ky hang tai hoi. hieu ((va cai) or (ve cham)) thuc va hang di cua tre*.