Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nang tai » hang tai, tang tai, sang tai
dan hang » ban hang, van hang, dat hang
thuc dan » thuc hanh, hoc dan, thuc vat
ve cham » va cham, ve chat, vu cham
hang di » hang doi, hang vi, hang dien
cuu tre » cua tre, cau tren, cau treo
tai hoi » tai khoi, dai hoi, tai hai
va cai » va cac, va bai, va dai
di cuu » di cau, di cua, dinh cuu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (thu hoach)) ky nang tai hoi. hieu ((va cai) or (ve cham)) thuc dan hang di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thu hoach)) ky nang tai hoi. hieu ((va cai) OR (ve cham)) thuc dan hang di cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thu hoach)) ky nang tai hoi. hieu ((va cai) or (ve cham)) thuc dan hang di cuu tre*.