Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
duy nang » dun nang, duy nong, duy sang
danh vai » danh sai, danh va, doanh van
cham luc » cham soc, nhan luc, cham cuu
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
va cham » va chat, va tham
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, xa hoi, me hoi

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) or (thu hoach)) duy nang ((ma hoi) OR (ma hoa)). lieu va cham luc va danh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (thu hoach)) duy nang ((ma hoi) OR (ma hoa)). lieu va cham luc va danh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sach) or (thu hoach)) duy nang ((ma hoi) OR (ma hoa)). lieu va cham luc va danh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) or (thu hoach)) duy nang ((ma hoi) OR (ma hoa)). lieu va cham luc va danh vai cua tre*.