Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hanh tai » thanh tai, hang tai, han tai
te sach » toc sach
tai cuu » tai cuc, tai buu, tai cua
xa hanh » xa thanh, xa khanh, va hanh
thuc xa » thuc xay, tuc xa, thuc va
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
lieu ha » lieu nha, liem ha, lieu ma
cao hoc » co hoc, cho hoc, chat hoc
cao hoi » cau hoi, co hoi, tao hoi

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 ky nang ((cao hoi) OR (cao hoc)). ((lieu ha) or (lieu va)) nam thuc xa hanh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((cao hoi) OR (cao hoc)). ((lieu ha) OR (lieu va)) nam thuc xa hanh tai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((cao hoi) OR (cao hoc)). ((lieu ha) or (lieu va)) nam thuc xa hanh tai cuu tre*".