Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hieu van » hieu va, thien van, lieu va
cam thuc » am thuc, nam thuc, cam thu
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
y nang » ky nang, ly nang, v nang
ve cau » ke cau, ve cac, le cau
va cau » van cau, va cac, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach y nang xa hoi. hieu van cam thuc dan hanh ((ve cau) OR (va cau)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach y nang xa hoi. hieu van cam thuc dan hanh ((ve cau) OR (va cau)) tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach y nang xa hoi. hieu van cam thuc dan hanh ((ve cau) OR (va cau)) tre*.