Perhaps you should try some spelling variations:
thien van » thi van
su sach » so sach
va hang » van hang, va nang, va lang
nam luc » nang luc, nhan luc, nam thuc
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
vu sach » vu bach, vu khach
luc va » duc va, tuc va, loc va
di cu » di cau, di cua, da cu
di du » li du

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) OR (vu sach)) ky tang xa hoi. thien van nam luc va hang ((di cu) or (di du)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky tang xa hoi. thien van nam luc va hang ((di cu) OR (di du)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ky tang xa hoi. thien van nam luc va hang ((di cu) or (di du)) tren".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) ky tang xa hoi. thien van nam luc va hang ((di cu) or (di du)) tren*.