Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
te sach » toc sach
hang di » hang doi, hang vi, hang dien
hanh di » hanh vi, hanh de, danh di
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
ma hoi » mai hoi, xa hoi, ma hoa
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thuoc sach)) ty nang ma hoi. hieu va cac xuc van ((hanh di) OR (hang di)) cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuoc sach)) ty nang ma hoi. hieu va cac xuc van ((hanh di) OR (hang di)) cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thuoc sach)) ty nang ma hoi. hieu va cac xuc van ((hanh di) OR (hang di)) cua su".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuoc sach)) ty nang ma hoi. hieu va cac xuc van ((hanh di) OR (hang di)) cua su*.