Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
va hanh » van hanh, va thanh, va danh
sach ty » sach y, sach tu, sach thu
nang xa » lang xa, nang ma, mang xa
su viet » so viet
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
xuc va » duc va, tuc 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 ty ((nang xa) or (nang x)) hoi. hieu ((ve cam) OR (va cam)) xuc va hanh vi su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ty ((nang xa) OR (nang x)) hoi. hieu ((ve cam) OR (va cam)) xuc va hanh vi su viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ty ((nang xa) or (nang x)) hoi. hieu ((ve cam) OR (va cam)) xuc va hanh vi su viet".
• Adding a wildcard symbol may retrieve word variants: thuat sach ty ((nang xa) or (nang x)) hoi. hieu ((ve cam) OR (va cam)) xuc va hanh vi su viet*.