Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
tinh vai » tinh va, tinh hai, tinh bai
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
va tinh » may tinh
nam luc » nang luc, nhan luc, nam thuc
cu tren » tu tren, dua tren
ma hoi » mai hoi, ma hoa, me hoi
luc va » duc va, tuc va, loc va
vai cu » vai cua, van cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thuoc sach)) ky nang ((ma hoi) or (xa hoi)). hieu van nam luc va tinh vai cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuoc sach)) ky nang ((ma hoi) OR (xa hoi)). hieu van nam luc va tinh vai cu tren.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuoc sach)) ky nang ((ma hoi) or (xa hoi)). hieu van nam luc va tinh vai cu tren*.