Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua viet » ca viet, hoa viet, cua vat
lang ha » long ha
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
di cua » dai cua, doi cua, de cua
ve cam » ve cham, ve cac, ve cai

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 y ((nang xa) or (lang ha)) hoi. hieu ((ve cam) OR (va cam)) xuc va hanh di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y ((nang xa) OR (lang ha)) hoi. hieu ((ve cam) OR (va cam)) xuc va hanh di cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y ((nang xa) or (lang ha)) hoi. hieu ((ve cam) OR (va cam)) xuc va hanh di cua viet".
• Adding a wildcard symbol may retrieve word variants: thuat sach y ((nang xa) or (lang ha)) hoi. hieu ((ve cam) OR (va cam)) xuc va hanh di cua viet*.