Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
hoc sach » hoc sinh, hoc cac, hoc anh
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
hanh ve » hanh vi, hanh va, hanh kem
cau tre » cau tren, cau treo, cau tra
y nang » ky nang, ly nang, v nang
ve cau » ke cau, va cau, ve cac

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