Perhaps you should try some spelling variations:
dinh dinh » binh dinh, hinh dinh, dinh kinh
hoc sach » hoc sinh, hoc cac, hoc anh
thi nang » thi cong, ki nang, thi hanh
dinh cuu » dinh chi
than luc » nhan luc, than duc, thanh luu
va dinh » van dinh, va kinh, va tinh
cuu tre » cua tre, cau tren, cau treo
thi lan » thi hanh, thi lien
thi van » thi hanh
nang ma » tang ma, sang ma, nang cao
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, xa hoi, ma hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu hoach) or (hoc sach)) thi nang ma hoi. ((thi van) OR (thi lan)) than luc va dinh dinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu hoach) OR (hoc sach)) thi nang ma hoi. ((thi van) OR (thi lan)) than luc va dinh dinh cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu hoach) or (hoc sach)) thi nang ma hoi. ((thi van) OR (thi lan)) than luc va dinh dinh cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((thu hoach) or (hoc sach)) thi nang ma hoi. ((thi van) OR (thi lan)) than luc va dinh dinh cuu tre*.