Perhaps you should try some spelling variations:
thuoc sach » hoc sach, thuat sach, thuoc sinh
nuoc sach » nguoi sach, hoc sach, cuoc cach
van hanh » van thanh, ban hanh, van anh
luoc van » luoc can, luoc va, luc van
van lam » van nam
hanh de » hanh ve, hanh kem
van cam » van nam, van cau, van dam
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
de cua » le cua, te cua, dieu cua
cua te » cua tu

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 (nuoc sach)) ly nang xa hoi. hieu ((van cam) OR (van lam)) luoc van hanh de cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (nuoc sach)) ly nang xa hoi. hieu ((van cam) OR (van lam)) luoc van hanh de cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (nuoc sach)) ly nang xa hoi. hieu ((van cam) OR (van lam)) luoc van hanh de cua te".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (nuoc sach)) ly nang xa hoi. hieu ((van cam) OR (van lam)) luoc van hanh de cua te*.