Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cam thuc » am thuc, nam thuc, cam thu
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va danh » va dinh, va dan, va hanh
va cam » va cham, va cac, va cao
di su » doi su, ki su, da su
tuan » quan, tran, luan

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 (thuat sach)) ky nang xa hoi. hieu va cam thuc ((va danh) or (tuan anh)) di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) ky nang xa hoi. hieu va cam thuc ((va danh) OR (tuan anh)) di su triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) ky nang xa hoi. hieu va cam thuc ((va danh) or (tuan anh)) di su triet*.