Perhaps you should try some spelling variations:
nam trung » nam trong, tai trung, ba trung
nam truc » nam truoc, nam thuc, nam thuoc
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
vai cuu » vai cua
xa hanh » xa thanh, xa khanh, va hanh
tu sach » thu sach, su sach, te sach
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
cuu tre » cua tre, cau tren, cau treo

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 y ((nang ma) or (tang ma)) hoi. hieu van ((nam truc) OR (nam trung)) xa hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang ma) OR (tang ma)) hoi. hieu van ((nam truc) OR (nam trung)) xa hanh vai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang ma) or (tang ma)) hoi. hieu van ((nam truc) OR (nam trung)) xa hanh vai cuu tre*".