Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
danh dai » danh dau, danh di, danh sai
duy nang » dun nang, duy nong, duy sang
va cham » va chat, va tham
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa

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