Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
cham loc » cham soc, chon loc, cham o
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
ve cham » va cham, ve chat, vu cham
va hang » van hang, va nang, va lang
hieu ve » hieu va, hieu van
loc va » hoc va, luc va
va ca » va cao, va cai, va cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) OR (thuoc sach)) ty nang xa hoi. hieu ve cham loc va hang ((va ca) or (va cac)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) ty nang xa hoi. hieu ve cham loc va hang ((va ca) OR (va cac)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuoc sach)) ty nang xa hoi. hieu ve cham loc va hang ((va ca) or (va cac)) viet".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuoc sach)) ty nang xa hoi. hieu ve cham loc va hang ((va ca) or (va cac)) viet*.