Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thu sach » thuat sach, thuoc sach, thu hoach
nang mai » nang ma, nang tai, lang mai
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
tu sach » su sach, te sach, tu cach
mai hoi » mai khoi, dai hoi, lai hoi
ly nang » ky nang, ly hang, ly vang
hieu va » lieu va, hieu qua
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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

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