Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thien van » thi van
lang van » dang van, tang van, hoang van
su triet » su viet, su tien, ve triet
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van bac » van ban, van bao, van hac
bac loc » bac hoc
va hanh » van hanh, va thanh, va danh
loc va » hoc va, luc va
vi su » va su, ve su, ki su

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky ((nang xa) or (lang van)) hoi. thien van bac loc va hanh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky ((nang xa) OR (lang van)) hoi. thien van bac loc va hanh vi su triet.
• Adding a wildcard symbol may retrieve word variants: thuat sach ky ((nang xa) or (lang van)) hoi. thien van bac loc va hanh vi su triet*.