Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
dan cua » dan ca, ban cua, dai cua
dao cua » dai cua, day cua, do cua
van cam » van nam, van lam, van cau
cam tuc » cam xuc, cam tu, nam thuc
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu hoach) or (thuoc sach)) ty nang xa hoi. hieu van cam tuc va hanh ((dao cua) or (dan cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu hoach) OR (thuoc sach)) ty nang xa hoi. hieu van cam tuc va hanh ((dao cua) OR (dan cua)) tre.
• Adding a wildcard symbol may retrieve word variants: ((thu hoach) or (thuoc sach)) ty nang xa hoi. hieu van cam tuc va hanh ((dao cua) or (dan cua)) tre*.