Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua viet » ca viet, cua vat, cua dieu
nang ma » tang ma, sang ma, nang cao
lang ha » long ha
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va

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