Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
tu sach » thu sach, su sach, te sach
ha nang » kha nang, hoa nang, da nang
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
tuc va » thuc va, truc va, tuc xa

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 hoach)) ha nang xa hoi. hieu vu cham tuc va danh vi ((va dieu) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) ha nang xa hoi. hieu vu cham tuc va danh vi ((va dieu) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu hoach)) ha nang xa hoi. hieu vu cham tuc va danh vi ((va dieu) or (cua vat))*.