Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
cham tuc » nham thuc, pham thuc, cham soc
ty nang » ty xang, ty hang, ly nang
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
di cua » dai cua, doi cua, de cua
cua te » cua tu

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

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