Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
nang ma » tang ma, sang ma, nang cao
cam duc » cam xuc, cao duc, pham duc
va cam » va cham, va cac, va cao
vi cua » vai cua, di cua
cua te » cua tu

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