Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
thuoc sach » hoc sach, nuoc sach, thuat sach
viec cac » vien cac, viec cua, viec lam
thu sach » tu sach, thuat sach, thu hoach
tu nang » tru nang, tu nong, tu nano
nang ma » tang ma, sang ma, nang cao
cac duc » cac du, cao duc, cac dac
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » di cua

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)) tu nang ma hoi. nhieu viec cac duc va danh ((vi cua) OR (vai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) tu nang ma hoi. nhieu viec cac duc va danh ((vi cua) OR (vai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thuoc sach)) tu nang ma hoi. nhieu viec cac duc va danh ((vi cua) OR (vai cua)) te".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuoc sach)) tu nang ma hoi. nhieu viec cac duc va danh ((vi cua) OR (vai cua)) te*.