Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
tang mai » tang ma, tang tai, lang mai
thu sach » thuat sach, thuoc sach, thu hoach
hieu van » hieu va, thien van, lieu va
san cua » sang cua, ban cua, dan cua
xuc van » duc van, luc van, vuc van
nam xuc » cam xuc, nam xua, nam thuc
tu sach » su sach, te sach, tu cach
mai hoi » mai khoi, dai hoi, lai hoi
ky tang » ky nang, ky dang, kho tang
vu sach » vu bach, su sach, vu khach
cua tu » cua tuc, cua su, cua cu

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))) or (vu sach)) ky tang mai hoi. hieu van nam xuc van thanh san cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (thu sach))) OR (vu sach)) ky tang mai hoi. hieu van nam xuc van thanh san cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((tu sach) OR (thu sach))) or (vu sach)) ky tang mai hoi. hieu van nam xuc van thanh san cua tu".
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) OR (thu sach))) or (vu sach)) ky tang mai hoi. hieu van nam xuc van thanh san cua tu*.